Home / 15,761.07-21,750.39-8,687.61

Finding the Fourth Proportional to 15,761.07, 21,750.39 and 8,687.61

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Solution

The fourth proportional to 15,761.07, 21,750.39 and 8,687.61 is: 11,988.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.07 : 21,750.39 = 8,687.61 : x
  2. Step 2: Convert to fraction form
    15,761.07/21,750.39 = 8,687.61/x
  3. Step 3: Cross multiply
    15,761.07x = 21,750.39 × 8,687.61
  4. Step 4: Simplify right side
    15,761.07x = 188,958,905.67
  5. Step 5: Solve for x
    x = 188,958,905.67/15,761.07
  6. Step 6: Final answer
    x = 11,988.96

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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.