Home / 21,251.49-31,874.61-8,769.90

Finding the Fourth Proportional to 21,251.49, 31,874.61 and 8,769.90

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Solution

The fourth proportional to 21,251.49, 31,874.61 and 8,769.90 is: 13,153.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.49 : 31,874.61 = 8,769.90 : x
  2. Step 2: Convert to fraction form
    21,251.49/31,874.61 = 8,769.90/x
  3. Step 3: Cross multiply
    21,251.49x = 31,874.61 × 8,769.90
  4. Step 4: Simplify right side
    21,251.49x = 279,537,025.71
  5. Step 5: Solve for x
    x = 279,537,025.71/21,251.49
  6. Step 6: Final answer
    x = 13,153.76

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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.