Home / 20,625.92-28,465.61-12,123.78

Finding the Fourth Proportional to 20,625.92, 28,465.61 and 12,123.78

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Solution

The fourth proportional to 20,625.92, 28,465.61 and 12,123.78 is: 16,731.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,625.92 : 28,465.61 = 12,123.78 : x
  2. Step 2: Convert to fraction form
    20,625.92/28,465.61 = 12,123.78/x
  3. Step 3: Cross multiply
    20,625.92x = 28,465.61 × 12,123.78
  4. Step 4: Simplify right side
    20,625.92x = 345,110,732.59
  5. Step 5: Solve for x
    x = 345,110,732.59/20,625.92
  6. Step 6: Final answer
    x = 16,731.90

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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.