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Finding the Fourth Proportional to 18,572.66, 27,856 and 5,421.95

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Solution

The fourth proportional to 18,572.66, 27,856 and 5,421.95 is: 8,132.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,572.66 : 27,856 = 5,421.95 : x
  2. Step 2: Convert to fraction form
    18,572.66/27,856 = 5,421.95/x
  3. Step 3: Cross multiply
    18,572.66x = 27,856 × 5,421.95
  4. Step 4: Simplify right side
    18,572.66x = 151,033,839.20
  5. Step 5: Solve for x
    x = 151,033,839.20/18,572.66
  6. Step 6: Final answer
    x = 8,132.05

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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.