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Finding the Fourth Proportional to 9,998.60, 13,798.18 and 5,751.77

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Solution

The fourth proportional to 9,998.60, 13,798.18 and 5,751.77 is: 7,937.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,998.60 : 13,798.18 = 5,751.77 : x
  2. Step 2: Convert to fraction form
    9,998.60/13,798.18 = 5,751.77/x
  3. Step 3: Cross multiply
    9,998.60x = 13,798.18 × 5,751.77
  4. Step 4: Simplify right side
    9,998.60x = 79,363,999.46
  5. Step 5: Solve for x
    x = 79,363,999.46/9,998.60
  6. Step 6: Final answer
    x = 7,937.51

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Half scale
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Double scale
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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.