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Finding the Fourth Proportional to 7,073.28, 9,760.88 and 3,929.44

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Solution

The fourth proportional to 7,073.28, 9,760.88 and 3,929.44 is: 5,422.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,073.28 : 9,760.88 = 3,929.44 : x
  2. Step 2: Convert to fraction form
    7,073.28/9,760.88 = 3,929.44/x
  3. Step 3: Cross multiply
    7,073.28x = 9,760.88 × 3,929.44
  4. Step 4: Simplify right side
    7,073.28x = 38,354,792.31
  5. Step 5: Solve for x
    x = 38,354,792.31/7,073.28
  6. Step 6: Final answer
    x = 5,422.49

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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.