Home / 21,233.17-31,815.13-12,915.74

Finding the Fourth Proportional to 21,233.17, 31,815.13 and 12,915.74

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Solution

The fourth proportional to 21,233.17, 31,815.13 and 12,915.74 is: 19,352.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,233.17 : 31,815.13 = 12,915.74 : x
  2. Step 2: Convert to fraction form
    21,233.17/31,815.13 = 12,915.74/x
  3. Step 3: Cross multiply
    21,233.17x = 31,815.13 × 12,915.74
  4. Step 4: Simplify right side
    21,233.17x = 410,915,755.78
  5. Step 5: Solve for x
    x = 410,915,755.78/21,233.17
  6. Step 6: Final answer
    x = 19,352.54

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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.