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Finding the Fourth Proportional to 18,872.70, 28,313.12 and 5,726.13

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Solution

The fourth proportional to 18,872.70, 28,313.12 and 5,726.13 is: 8,590.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,872.70 : 28,313.12 = 5,726.13 : x
  2. Step 2: Convert to fraction form
    18,872.70/28,313.12 = 5,726.13/x
  3. Step 3: Cross multiply
    18,872.70x = 28,313.12 × 5,726.13
  4. Step 4: Simplify right side
    18,872.70x = 162,124,605.83
  5. Step 5: Solve for x
    x = 162,124,605.83/18,872.70
  6. Step 6: Final answer
    x = 8,590.43

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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.