Home / 12,138.56-18,209.92-5,565.31

Finding the Fourth Proportional to 12,138.56, 18,209.92 and 5,565.31

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Solution

The fourth proportional to 12,138.56, 18,209.92 and 5,565.31 is: 8,348.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.56 : 18,209.92 = 5,565.31 : x
  2. Step 2: Convert to fraction form
    12,138.56/18,209.92 = 5,565.31/x
  3. Step 3: Cross multiply
    12,138.56x = 18,209.92 × 5,565.31
  4. Step 4: Simplify right side
    12,138.56x = 101,343,849.88
  5. Step 5: Solve for x
    x = 101,343,849.88/12,138.56
  6. Step 6: Final answer
    x = 8,348.92

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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.