Home / 21,687.90-32,531.85-18,757.50

Finding the Fourth Proportional to 21,687.90, 32,531.85 and 18,757.50

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Solution

The fourth proportional to 21,687.90, 32,531.85 and 18,757.50 is: 28,136.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,687.90 : 32,531.85 = 18,757.50 : x
  2. Step 2: Convert to fraction form
    21,687.90/32,531.85 = 18,757.50/x
  3. Step 3: Cross multiply
    21,687.90x = 32,531.85 × 18,757.50
  4. Step 4: Simplify right side
    21,687.90x = 610,216,176.38
  5. Step 5: Solve for x
    x = 610,216,176.38/21,687.90
  6. Step 6: Final answer
    x = 28,136.25

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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.