Home / 13,319.18-18,380.12-7,350.78

Finding the Fourth Proportional to 13,319.18, 18,380.12 and 7,350.78

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Solution

The fourth proportional to 13,319.18, 18,380.12 and 7,350.78 is: 10,143.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.18 : 18,380.12 = 7,350.78 : x
  2. Step 2: Convert to fraction form
    13,319.18/18,380.12 = 7,350.78/x
  3. Step 3: Cross multiply
    13,319.18x = 18,380.12 × 7,350.78
  4. Step 4: Simplify right side
    13,319.18x = 135,108,218.49
  5. Step 5: Solve for x
    x = 135,108,218.49/13,319.18
  6. Step 6: Final answer
    x = 10,143.88

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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.