Home / 21,531.88-29,710.56-13,032.55

Finding the Fourth Proportional to 21,531.88, 29,710.56 and 13,032.55

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Solution

The fourth proportional to 21,531.88, 29,710.56 and 13,032.55 is: 17,982.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.88 : 29,710.56 = 13,032.55 : x
  2. Step 2: Convert to fraction form
    21,531.88/29,710.56 = 13,032.55/x
  3. Step 3: Cross multiply
    21,531.88x = 29,710.56 × 13,032.55
  4. Step 4: Simplify right side
    21,531.88x = 387,204,358.73
  5. Step 5: Solve for x
    x = 387,204,358.73/21,531.88
  6. Step 6: Final answer
    x = 17,982.84

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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.