Home / 18,989.52-28,456.56-13,439.85

Finding the Fourth Proportional to 18,989.52, 28,456.56 and 13,439.85

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Solution

The fourth proportional to 18,989.52, 28,456.56 and 13,439.85 is: 20,140.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.52 : 28,456.56 = 13,439.85 : x
  2. Step 2: Convert to fraction form
    18,989.52/28,456.56 = 13,439.85/x
  3. Step 3: Cross multiply
    18,989.52x = 28,456.56 × 13,439.85
  4. Step 4: Simplify right side
    18,989.52x = 382,451,897.92
  5. Step 5: Solve for x
    x = 382,451,897.92/18,989.52
  6. Step 6: Final answer
    x = 20,140.16

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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.