Home / 21,349.71-29,452.40-13,387.95

Finding the Fourth Proportional to 21,349.71, 29,452.40 and 13,387.95

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Solution

The fourth proportional to 21,349.71, 29,452.40 and 13,387.95 is: 18,468.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,349.71 : 29,452.40 = 13,387.95 : x
  2. Step 2: Convert to fraction form
    21,349.71/29,452.40 = 13,387.95/x
  3. Step 3: Cross multiply
    21,349.71x = 29,452.40 × 13,387.95
  4. Step 4: Simplify right side
    21,349.71x = 394,307,191.64
  5. Step 5: Solve for x
    x = 394,307,191.64/21,349.71
  6. Step 6: Final answer
    x = 18,468.97

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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.