Home / 15,086.97-20,820.73-8,372.65

Finding the Fourth Proportional to 15,086.97, 20,820.73 and 8,372.65

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Solution

The fourth proportional to 15,086.97, 20,820.73 and 8,372.65 is: 11,554.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,086.97 : 20,820.73 = 8,372.65 : x
  2. Step 2: Convert to fraction form
    15,086.97/20,820.73 = 8,372.65/x
  3. Step 3: Cross multiply
    15,086.97x = 20,820.73 × 8,372.65
  4. Step 4: Simplify right side
    15,086.97x = 174,324,716.15
  5. Step 5: Solve for x
    x = 174,324,716.15/15,086.97
  6. Step 6: Final answer
    x = 11,554.65

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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.