Home / 20,542.47-30,819.90-8,690.15

Finding the Fourth Proportional to 20,542.47, 30,819.90 and 8,690.15

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Solution

The fourth proportional to 20,542.47, 30,819.90 and 8,690.15 is: 13,037.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.47 : 30,819.90 = 8,690.15 : x
  2. Step 2: Convert to fraction form
    20,542.47/30,819.90 = 8,690.15/x
  3. Step 3: Cross multiply
    20,542.47x = 30,819.90 × 8,690.15
  4. Step 4: Simplify right side
    20,542.47x = 267,829,553.99
  5. Step 5: Solve for x
    x = 267,829,553.99/20,542.47
  6. Step 6: Final answer
    x = 13,037.85

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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.