Home / 21,251.23-31,876.06-8,761.87

Finding the Fourth Proportional to 21,251.23, 31,876.06 and 8,761.87

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Solution

The fourth proportional to 21,251.23, 31,876.06 and 8,761.87 is: 13,142.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.23 : 31,876.06 = 8,761.87 : x
  2. Step 2: Convert to fraction form
    21,251.23/31,876.06 = 8,761.87/x
  3. Step 3: Cross multiply
    21,251.23x = 31,876.06 × 8,761.87
  4. Step 4: Simplify right side
    21,251.23x = 279,293,893.83
  5. Step 5: Solve for x
    x = 279,293,893.83/21,251.23
  6. Step 6: Final answer
    x = 13,142.48

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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.