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Finding the Fourth Proportional to 9,998.19, 13,789.15 and 7,486.28

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Solution

The fourth proportional to 9,998.19, 13,789.15 and 7,486.28 is: 10,324.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,998.19 : 13,789.15 = 7,486.28 : x
  2. Step 2: Convert to fraction form
    9,998.19/13,789.15 = 7,486.28/x
  3. Step 3: Cross multiply
    9,998.19x = 13,789.15 × 7,486.28
  4. Step 4: Simplify right side
    9,998.19x = 103,229,444.02
  5. Step 5: Solve for x
    x = 103,229,444.02/9,998.19
  6. Step 6: Final answer
    x = 10,324.81

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Find fourth proportional to 4,999.10, 6,894.58 and 3,743.14
Half scale
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Double scale
Find fourth proportional to 9,999.19, 13,790.53 and 7,487.28
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.