Home / 21,087.97-31,640.70-9,235.62

Finding the Fourth Proportional to 21,087.97, 31,640.70 and 9,235.62

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Solution

The fourth proportional to 21,087.97, 31,640.70 and 9,235.62 is: 13,857.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.97 : 31,640.70 = 9,235.62 : x
  2. Step 2: Convert to fraction form
    21,087.97/31,640.70 = 9,235.62/x
  3. Step 3: Cross multiply
    21,087.97x = 31,640.70 × 9,235.62
  4. Step 4: Simplify right side
    21,087.97x = 292,221,481.73
  5. Step 5: Solve for x
    x = 292,221,481.73/21,087.97
  6. Step 6: Final answer
    x = 13,857.26

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1.5x scale

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.