Home / 13,144.20-18,138.20-7,174.68

Finding the Fourth Proportional to 13,144.20, 18,138.20 and 7,174.68

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Solution

The fourth proportional to 13,144.20, 18,138.20 and 7,174.68 is: 9,900.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.20 : 18,138.20 = 7,174.68 : x
  2. Step 2: Convert to fraction form
    13,144.20/18,138.20 = 7,174.68/x
  3. Step 3: Cross multiply
    13,144.20x = 18,138.20 × 7,174.68
  4. Step 4: Simplify right side
    13,144.20x = 130,135,780.78
  5. Step 5: Solve for x
    x = 130,135,780.78/13,144.20
  6. Step 6: Final answer
    x = 9,900.62

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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.