Home / 22,986.57-31,721.45-12,915.30

Finding the Fourth Proportional to 22,986.57, 31,721.45 and 12,915.30

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Solution

The fourth proportional to 22,986.57, 31,721.45 and 12,915.30 is: 17,823.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,986.57 : 31,721.45 = 12,915.30 : x
  2. Step 2: Convert to fraction form
    22,986.57/31,721.45 = 12,915.30/x
  3. Step 3: Cross multiply
    22,986.57x = 31,721.45 × 12,915.30
  4. Step 4: Simplify right side
    22,986.57x = 409,691,978.61
  5. Step 5: Solve for x
    x = 409,691,978.61/22,986.57
  6. Step 6: Final answer
    x = 17,823.10

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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.