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Finding the Fourth Proportional to 15,990.88, 22,062.24 and 8,915.92

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Solution

The fourth proportional to 15,990.88, 22,062.24 and 8,915.92 is: 12,301.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,990.88 : 22,062.24 = 8,915.92 : x
  2. Step 2: Convert to fraction form
    15,990.88/22,062.24 = 8,915.92/x
  3. Step 3: Cross multiply
    15,990.88x = 22,062.24 × 8,915.92
  4. Step 4: Simplify right side
    15,990.88x = 196,705,166.86
  5. Step 5: Solve for x
    x = 196,705,166.86/15,990.88
  6. Step 6: Final answer
    x = 12,301.08

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.