Home / 15,930.54-22,000.14-13,125.78

Finding the Fourth Proportional to 15,930.54, 22,000.14 and 13,125.78

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Solution

The fourth proportional to 15,930.54, 22,000.14 and 13,125.78 is: 18,126.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,930.54 : 22,000.14 = 13,125.78 : x
  2. Step 2: Convert to fraction form
    15,930.54/22,000.14 = 13,125.78/x
  3. Step 3: Cross multiply
    15,930.54x = 22,000.14 × 13,125.78
  4. Step 4: Simplify right side
    15,930.54x = 288,768,997.61
  5. Step 5: Solve for x
    x = 288,768,997.61/15,930.54
  6. Step 6: Final answer
    x = 18,126.76

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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.