Home / 18,521.28-27,781.92-8,665.20

Finding the Fourth Proportional to 18,521.28, 27,781.92 and 8,665.20

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Solution

The fourth proportional to 18,521.28, 27,781.92 and 8,665.20 is: 12,997.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,521.28 : 27,781.92 = 8,665.20 : x
  2. Step 2: Convert to fraction form
    18,521.28/27,781.92 = 8,665.20/x
  3. Step 3: Cross multiply
    18,521.28x = 27,781.92 × 8,665.20
  4. Step 4: Simplify right side
    18,521.28x = 240,735,893.18
  5. Step 5: Solve for x
    x = 240,735,893.18/18,521.28
  6. Step 6: Final answer
    x = 12,997.80

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1.5x scale

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.