Home / 15,761.33-21,750.62-8,687.73

Finding the Fourth Proportional to 15,761.33, 21,750.62 and 8,687.73

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Solution

The fourth proportional to 15,761.33, 21,750.62 and 8,687.73 is: 11,989.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.33 : 21,750.62 = 8,687.73 : x
  2. Step 2: Convert to fraction form
    15,761.33/21,750.62 = 8,687.73/x
  3. Step 3: Cross multiply
    15,761.33x = 21,750.62 × 8,687.73
  4. Step 4: Simplify right side
    15,761.33x = 188,963,513.89
  5. Step 5: Solve for x
    x = 188,963,513.89/15,761.33
  6. Step 6: Final answer
    x = 11,989.06

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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.