Home / 15,215.32-20,996.39-8,499.61

Finding the Fourth Proportional to 15,215.32, 20,996.39 and 8,499.61

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Solution

The fourth proportional to 15,215.32, 20,996.39 and 8,499.61 is: 11,729.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.32 : 20,996.39 = 8,499.61 : x
  2. Step 2: Convert to fraction form
    15,215.32/20,996.39 = 8,499.61/x
  3. Step 3: Cross multiply
    15,215.32x = 20,996.39 × 8,499.61
  4. Step 4: Simplify right side
    15,215.32x = 178,460,978.93
  5. Step 5: Solve for x
    x = 178,460,978.93/15,215.32
  6. Step 6: Final answer
    x = 11,729.04

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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.