Home / 21,136.80-31,706.25-17,432.20

Finding the Fourth Proportional to 21,136.80, 31,706.25 and 17,432.20

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Solution

The fourth proportional to 21,136.80, 31,706.25 and 17,432.20 is: 26,149.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.80 : 31,706.25 = 17,432.20 : x
  2. Step 2: Convert to fraction form
    21,136.80/31,706.25 = 17,432.20/x
  3. Step 3: Cross multiply
    21,136.80x = 31,706.25 × 17,432.20
  4. Step 4: Simplify right side
    21,136.80x = 552,709,691.25
  5. Step 5: Solve for x
    x = 552,709,691.25/21,136.80
  6. Step 6: Final answer
    x = 26,149.17

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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.