Home / 21,915.97-32,872.33-8,759.95

Finding the Fourth Proportional to 21,915.97, 32,872.33 and 8,759.95

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Solution

The fourth proportional to 21,915.97, 32,872.33 and 8,759.95 is: 13,139.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.97 : 32,872.33 = 8,759.95 : x
  2. Step 2: Convert to fraction form
    21,915.97/32,872.33 = 8,759.95/x
  3. Step 3: Cross multiply
    21,915.97x = 32,872.33 × 8,759.95
  4. Step 4: Simplify right side
    21,915.97x = 287,959,967.18
  5. Step 5: Solve for x
    x = 287,959,967.18/21,915.97
  6. Step 6: Final answer
    x = 13,139.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.