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Finding the Fourth Proportional to 22,685.20, 34,013.88 and 8,818

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Solution

The fourth proportional to 22,685.20, 34,013.88 and 8,818 is: 13,221.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,685.20 : 34,013.88 = 8,818 : x
  2. Step 2: Convert to fraction form
    22,685.20/34,013.88 = 8,818/x
  3. Step 3: Cross multiply
    22,685.20x = 34,013.88 × 8,818
  4. Step 4: Simplify right side
    22,685.20x = 299,934,393.84
  5. Step 5: Solve for x
    x = 299,934,393.84/22,685.20
  6. Step 6: Final answer
    x = 13,221.59

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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.