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Finding the Fourth Proportional to 15,792.75, 21,793.41 and 8,719.02

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Solution

The fourth proportional to 15,792.75, 21,793.41 and 8,719.02 is: 12,031.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,792.75 : 21,793.41 = 8,719.02 : x
  2. Step 2: Convert to fraction form
    15,792.75/21,793.41 = 8,719.02/x
  3. Step 3: Cross multiply
    15,792.75x = 21,793.41 × 8,719.02
  4. Step 4: Simplify right side
    15,792.75x = 190,017,177.66
  5. Step 5: Solve for x
    x = 190,017,177.66/15,792.75
  6. Step 6: Final answer
    x = 12,031.92

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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.