Home / 15,188.34-22,791.18-12,129.78

Finding the Fourth Proportional to 15,188.34, 22,791.18 and 12,129.78

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Solution

The fourth proportional to 15,188.34, 22,791.18 and 12,129.78 is: 18,201.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,188.34 : 22,791.18 = 12,129.78 : x
  2. Step 2: Convert to fraction form
    15,188.34/22,791.18 = 12,129.78/x
  3. Step 3: Cross multiply
    15,188.34x = 22,791.18 × 12,129.78
  4. Step 4: Simplify right side
    15,188.34x = 276,451,999.34
  5. Step 5: Solve for x
    x = 276,451,999.34/15,188.34
  6. Step 6: Final answer
    x = 18,201.59

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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.