Home / 21,331.31-29,434.88-15,032.75

Finding the Fourth Proportional to 21,331.31, 29,434.88 and 15,032.75

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Solution

The fourth proportional to 21,331.31, 29,434.88 and 15,032.75 is: 20,743.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.31 : 29,434.88 = 15,032.75 : x
  2. Step 2: Convert to fraction form
    21,331.31/29,434.88 = 15,032.75/x
  3. Step 3: Cross multiply
    21,331.31x = 29,434.88 × 15,032.75
  4. Step 4: Simplify right side
    21,331.31x = 442,487,117.16
  5. Step 5: Solve for x
    x = 442,487,117.16/21,331.31
  6. Step 6: Final answer
    x = 20,743.55

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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.