Home / 13,221.38-18,245.10-7,252.90

Finding the Fourth Proportional to 13,221.38, 18,245.10 and 7,252.90

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Solution

The fourth proportional to 13,221.38, 18,245.10 and 7,252.90 is: 10,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.38 : 18,245.10 = 7,252.90 : x
  2. Step 2: Convert to fraction form
    13,221.38/18,245.10 = 7,252.90/x
  3. Step 3: Cross multiply
    13,221.38x = 18,245.10 × 7,252.90
  4. Step 4: Simplify right side
    13,221.38x = 132,329,885.79
  5. Step 5: Solve for x
    x = 132,329,885.79/13,221.38
  6. Step 6: Final answer
    x = 10,008.78

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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.