Home / 20,631.38-28,471.23-11,199.87

Finding the Fourth Proportional to 20,631.38, 28,471.23 and 11,199.87

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Solution

The fourth proportional to 20,631.38, 28,471.23 and 11,199.87 is: 15,455.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.38 : 28,471.23 = 11,199.87 : x
  2. Step 2: Convert to fraction form
    20,631.38/28,471.23 = 11,199.87/x
  3. Step 3: Cross multiply
    20,631.38x = 28,471.23 × 11,199.87
  4. Step 4: Simplify right side
    20,631.38x = 318,874,074.74
  5. Step 5: Solve for x
    x = 318,874,074.74/20,631.38
  6. Step 6: Final answer
    x = 15,455.78

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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.