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Finding the Fourth Proportional to 12,329.76, 17,015.20 and 6,740.76

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Solution

The fourth proportional to 12,329.76, 17,015.20 and 6,740.76 is: 9,302.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,329.76 : 17,015.20 = 6,740.76 : x
  2. Step 2: Convert to fraction form
    12,329.76/17,015.20 = 6,740.76/x
  3. Step 3: Cross multiply
    12,329.76x = 17,015.20 × 6,740.76
  4. Step 4: Simplify right side
    12,329.76x = 114,695,379.55
  5. Step 5: Solve for x
    x = 114,695,379.55/12,329.76
  6. Step 6: Final answer
    x = 9,302.32

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Find fourth proportional to 6,164.88, 8,507.60 and 3,370.38
Half scale
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Double scale
Find fourth proportional to 12,330.76, 17,016.58 and 6,741.76
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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.