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Finding the Fourth Proportional to 25,337.92, 34,978.80 and 15,911.68

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Solution

The fourth proportional to 25,337.92, 34,978.80 and 15,911.68 is: 21,965.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,337.92 : 34,978.80 = 15,911.68 : x
  2. Step 2: Convert to fraction form
    25,337.92/34,978.80 = 15,911.68/x
  3. Step 3: Cross multiply
    25,337.92x = 34,978.80 × 15,911.68
  4. Step 4: Simplify right side
    25,337.92x = 556,571,472.38
  5. Step 5: Solve for x
    x = 556,571,472.38/25,337.92
  6. Step 6: Final answer
    x = 21,965.95

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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.