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Finding the Fourth Proportional to 17,818.56, 26,710.20 and 8,442

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Solution

The fourth proportional to 17,818.56, 26,710.20 and 8,442 is: 12,654.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,818.56 : 26,710.20 = 8,442 : x
  2. Step 2: Convert to fraction form
    17,818.56/26,710.20 = 8,442/x
  3. Step 3: Cross multiply
    17,818.56x = 26,710.20 × 8,442
  4. Step 4: Simplify right side
    17,818.56x = 225,487,508.40
  5. Step 5: Solve for x
    x = 225,487,508.40/17,818.56
  6. Step 6: Final answer
    x = 12,654.64

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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.