Home / 21,042.89-31,549.75-7,891.73

Finding the Fourth Proportional to 21,042.89, 31,549.75 and 7,891.73

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Solution

The fourth proportional to 21,042.89, 31,549.75 and 7,891.73 is: 11,832.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.89 : 31,549.75 = 7,891.73 : x
  2. Step 2: Convert to fraction form
    21,042.89/31,549.75 = 7,891.73/x
  3. Step 3: Cross multiply
    21,042.89x = 31,549.75 × 7,891.73
  4. Step 4: Simplify right side
    21,042.89x = 248,982,108.57
  5. Step 5: Solve for x
    x = 248,982,108.57/21,042.89
  6. Step 6: Final answer
    x = 11,832.13

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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.