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Finding the Fourth Proportional to 19,915.32, 29,876.28 and 6,766.32

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Solution

The fourth proportional to 19,915.32, 29,876.28 and 6,766.32 is: 10,150.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915.32 : 29,876.28 = 6,766.32 : x
  2. Step 2: Convert to fraction form
    19,915.32/29,876.28 = 6,766.32/x
  3. Step 3: Cross multiply
    19,915.32x = 29,876.28 × 6,766.32
  4. Step 4: Simplify right side
    19,915.32x = 202,152,470.89
  5. Step 5: Solve for x
    x = 202,152,470.89/19,915.32
  6. Step 6: Final answer
    x = 10,150.60

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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.