Home / 15,441.20-23,129.40-12,138.56

Finding the Fourth Proportional to 15,441.20, 23,129.40 and 12,138.56

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Solution

The fourth proportional to 15,441.20, 23,129.40 and 12,138.56 is: 18,182.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,441.20 : 23,129.40 = 12,138.56 : x
  2. Step 2: Convert to fraction form
    15,441.20/23,129.40 = 12,138.56/x
  3. Step 3: Cross multiply
    15,441.20x = 23,129.40 × 12,138.56
  4. Step 4: Simplify right side
    15,441.20x = 280,757,609.66
  5. Step 5: Solve for x
    x = 280,757,609.66/15,441.20
  6. Step 6: Final answer
    x = 18,182.37

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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.