Home / 31,121.83-42,897.92-21,046.60

Finding the Fourth Proportional to 31,121.83, 42,897.92 and 21,046.60

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Solution

The fourth proportional to 31,121.83, 42,897.92 and 21,046.60 is: 29,010.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.83 : 42,897.92 = 21,046.60 : x
  2. Step 2: Convert to fraction form
    31,121.83/42,897.92 = 21,046.60/x
  3. Step 3: Cross multiply
    31,121.83x = 42,897.92 × 21,046.60
  4. Step 4: Simplify right side
    31,121.83x = 902,855,363.07
  5. Step 5: Solve for x
    x = 902,855,363.07/31,121.83
  6. Step 6: Final answer
    x = 29,010.36

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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.