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Finding the Fourth Proportional to 7,209.28, 9,948.74 and 3,897.28

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Solution

The fourth proportional to 7,209.28, 9,948.74 and 3,897.28 is: 5,378.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,209.28 : 9,948.74 = 3,897.28 : x
  2. Step 2: Convert to fraction form
    7,209.28/9,948.74 = 3,897.28/x
  3. Step 3: Cross multiply
    7,209.28x = 9,948.74 × 3,897.28
  4. Step 4: Simplify right side
    7,209.28x = 38,773,025.43
  5. Step 5: Solve for x
    x = 38,773,025.43/7,209.28
  6. Step 6: Final answer
    x = 5,378.21

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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.