Home / 28,487.53-42,694.11-20,616.55

Finding the Fourth Proportional to 28,487.53, 42,694.11 and 20,616.55

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Solution

The fourth proportional to 28,487.53, 42,694.11 and 20,616.55 is: 30,897.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.53 : 42,694.11 = 20,616.55 : x
  2. Step 2: Convert to fraction form
    28,487.53/42,694.11 = 20,616.55/x
  3. Step 3: Cross multiply
    28,487.53x = 42,694.11 × 20,616.55
  4. Step 4: Simplify right side
    28,487.53x = 880,205,253.52
  5. Step 5: Solve for x
    x = 880,205,253.52/28,487.53
  6. Step 6: Final answer
    x = 30,897.91

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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.