Home / 31,160.18-43,010.26-21,731.78

Finding the Fourth Proportional to 31,160.18, 43,010.26 and 21,731.78

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Solution

The fourth proportional to 31,160.18, 43,010.26 and 21,731.78 is: 29,996.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,160.18 : 43,010.26 = 21,731.78 : x
  2. Step 2: Convert to fraction form
    31,160.18/43,010.26 = 21,731.78/x
  3. Step 3: Cross multiply
    31,160.18x = 43,010.26 × 21,731.78
  4. Step 4: Simplify right side
    31,160.18x = 934,689,508.06
  5. Step 5: Solve for x
    x = 934,689,508.06/31,160.18
  6. Step 6: Final answer
    x = 29,996.28

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1.5x scale

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.