Home / 20,487.72-28,279.46-13,773.62

Finding the Fourth Proportional to 20,487.72, 28,279.46 and 13,773.62

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Solution

The fourth proportional to 20,487.72, 28,279.46 and 13,773.62 is: 19,011.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.72 : 28,279.46 = 13,773.62 : x
  2. Step 2: Convert to fraction form
    20,487.72/28,279.46 = 13,773.62/x
  3. Step 3: Cross multiply
    20,487.72x = 28,279.46 × 13,773.62
  4. Step 4: Simplify right side
    20,487.72x = 389,510,535.85
  5. Step 5: Solve for x
    x = 389,510,535.85/20,487.72
  6. Step 6: Final answer
    x = 19,011.90

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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.