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Finding the Fourth Proportional to 18,726.57, 28,104.10 and 6,891.53

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Solution

The fourth proportional to 18,726.57, 28,104.10 and 6,891.53 is: 10,342.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.57 : 28,104.10 = 6,891.53 : x
  2. Step 2: Convert to fraction form
    18,726.57/28,104.10 = 6,891.53/x
  3. Step 3: Cross multiply
    18,726.57x = 28,104.10 × 6,891.53
  4. Step 4: Simplify right side
    18,726.57x = 193,680,090.52
  5. Step 5: Solve for x
    x = 193,680,090.52/18,726.57
  6. Step 6: Final answer
    x = 10,342.53

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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.