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Finding the Fourth Proportional to 18,750, 25,875 and 10,367.28

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Solution

The fourth proportional to 18,750, 25,875 and 10,367.28 is: 14,306.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750 : 25,875 = 10,367.28 : x
  2. Step 2: Convert to fraction form
    18,750/25,875 = 10,367.28/x
  3. Step 3: Cross multiply
    18,750x = 25,875 × 10,367.28
  4. Step 4: Simplify right side
    18,750x = 268,253,370.00
  5. Step 5: Solve for x
    x = 268,253,370.00/18,750
  6. Step 6: Final answer
    x = 14,306.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.