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Finding the Fourth Proportional to 6,615.28, 9,129.05 and 3,631.17

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Solution

The fourth proportional to 6,615.28, 9,129.05 and 3,631.17 is: 5,010.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615.28 : 9,129.05 = 3,631.17 : x
  2. Step 2: Convert to fraction form
    6,615.28/9,129.05 = 3,631.17/x
  3. Step 3: Cross multiply
    6,615.28x = 9,129.05 × 3,631.17
  4. Step 4: Simplify right side
    6,615.28x = 33,149,132.49
  5. Step 5: Solve for x
    x = 33,149,132.49/6,615.28
  6. Step 6: Final answer
    x = 5,010.99

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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.