Home / 21,686.52-29,915.85-13,191.24

Finding the Fourth Proportional to 21,686.52, 29,915.85 and 13,191.24

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Solution

The fourth proportional to 21,686.52, 29,915.85 and 13,191.24 is: 18,196.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.52 : 29,915.85 = 13,191.24 : x
  2. Step 2: Convert to fraction form
    21,686.52/29,915.85 = 13,191.24/x
  3. Step 3: Cross multiply
    21,686.52x = 29,915.85 × 13,191.24
  4. Step 4: Simplify right side
    21,686.52x = 394,627,206.62
  5. Step 5: Solve for x
    x = 394,627,206.62/21,686.52
  6. Step 6: Final answer
    x = 18,196.89

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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.