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Finding the Fourth Proportional to 18,891.16, 28,337.76 and 5,742.54

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Solution

The fourth proportional to 18,891.16, 28,337.76 and 5,742.54 is: 8,614.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.16 : 28,337.76 = 5,742.54 : x
  2. Step 2: Convert to fraction form
    18,891.16/28,337.76 = 5,742.54/x
  3. Step 3: Cross multiply
    18,891.16x = 28,337.76 × 5,742.54
  4. Step 4: Simplify right side
    18,891.16x = 162,730,564.27
  5. Step 5: Solve for x
    x = 162,730,564.27/18,891.16
  6. Step 6: Final answer
    x = 8,614.11

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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.