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Finding the Fourth Proportional to 18,475.05, 27,721.86 and 8,615.10

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Solution

The fourth proportional to 18,475.05, 27,721.86 and 8,615.10 is: 12,926.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,475.05 : 27,721.86 = 8,615.10 : x
  2. Step 2: Convert to fraction form
    18,475.05/27,721.86 = 8,615.10/x
  3. Step 3: Cross multiply
    18,475.05x = 27,721.86 × 8,615.10
  4. Step 4: Simplify right side
    18,475.05x = 238,826,596.09
  5. Step 5: Solve for x
    x = 238,826,596.09/18,475.05
  6. Step 6: Final answer
    x = 12,926.98

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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.