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Finding the Fourth Proportional to 25,691.70, 38,537.55 and 7,221.30

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Solution

The fourth proportional to 25,691.70, 38,537.55 and 7,221.30 is: 10,831.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,691.70 : 38,537.55 = 7,221.30 : x
  2. Step 2: Convert to fraction form
    25,691.70/38,537.55 = 7,221.30/x
  3. Step 3: Cross multiply
    25,691.70x = 38,537.55 × 7,221.30
  4. Step 4: Simplify right side
    25,691.70x = 278,291,209.82
  5. Step 5: Solve for x
    x = 278,291,209.82/25,691.70
  6. Step 6: Final answer
    x = 10,831.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.