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Finding the Fourth Proportional to 17,691.60, 26,527.80 and 8,787.40

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Solution

The fourth proportional to 17,691.60, 26,527.80 and 8,787.40 is: 13,176.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,691.60 : 26,527.80 = 8,787.40 : x
  2. Step 2: Convert to fraction form
    17,691.60/26,527.80 = 8,787.40/x
  3. Step 3: Cross multiply
    17,691.60x = 26,527.80 × 8,787.40
  4. Step 4: Simplify right side
    17,691.60x = 233,110,389.72
  5. Step 5: Solve for x
    x = 233,110,389.72/17,691.60
  6. Step 6: Final answer
    x = 13,176.33

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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.