Home / 20,555.28-28,380.24-13,493.76

Finding the Fourth Proportional to 20,555.28, 28,380.24 and 13,493.76

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Solution

The fourth proportional to 20,555.28, 28,380.24 and 13,493.76 is: 18,630.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.28 : 28,380.24 = 13,493.76 : x
  2. Step 2: Convert to fraction form
    20,555.28/28,380.24 = 13,493.76/x
  3. Step 3: Cross multiply
    20,555.28x = 28,380.24 × 13,493.76
  4. Step 4: Simplify right side
    20,555.28x = 382,956,147.30
  5. Step 5: Solve for x
    x = 382,956,147.30/20,555.28
  6. Step 6: Final answer
    x = 18,630.55

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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.