Home / 20,686.92-31,037.90-10,155.83

Finding the Fourth Proportional to 20,686.92, 31,037.90 and 10,155.83

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Solution

The fourth proportional to 20,686.92, 31,037.90 and 10,155.83 is: 15,237.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.92 : 31,037.90 = 10,155.83 : x
  2. Step 2: Convert to fraction form
    20,686.92/31,037.90 = 10,155.83/x
  3. Step 3: Cross multiply
    20,686.92x = 31,037.90 × 10,155.83
  4. Step 4: Simplify right side
    20,686.92x = 315,215,635.96
  5. Step 5: Solve for x
    x = 315,215,635.96/20,686.92
  6. Step 6: Final answer
    x = 15,237.44

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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.