Home / 13,613.28-20,385.36-10,871.52

Finding the Fourth Proportional to 13,613.28, 20,385.36 and 10,871.52

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Solution

The fourth proportional to 13,613.28, 20,385.36 and 10,871.52 is: 16,279.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.28 : 20,385.36 = 10,871.52 : x
  2. Step 2: Convert to fraction form
    13,613.28/20,385.36 = 10,871.52/x
  3. Step 3: Cross multiply
    13,613.28x = 20,385.36 × 10,871.52
  4. Step 4: Simplify right side
    13,613.28x = 221,619,848.95
  5. Step 5: Solve for x
    x = 221,619,848.95/13,613.28
  6. Step 6: Final answer
    x = 16,279.68

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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.