Home / 21,642.71-29,861.87-13,144.60

Finding the Fourth Proportional to 21,642.71, 29,861.87 and 13,144.60

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Solution

The fourth proportional to 21,642.71, 29,861.87 and 13,144.60 is: 18,136.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,642.71 : 29,861.87 = 13,144.60 : x
  2. Step 2: Convert to fraction form
    21,642.71/29,861.87 = 13,144.60/x
  3. Step 3: Cross multiply
    21,642.71x = 29,861.87 × 13,144.60
  4. Step 4: Simplify right side
    21,642.71x = 392,522,294.61
  5. Step 5: Solve for x
    x = 392,522,294.61/21,642.71
  6. Step 6: Final answer
    x = 18,136.46

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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.