Home / 20,319.18-28,040.34-11,366.70

Finding the Fourth Proportional to 20,319.18, 28,040.34 and 11,366.70

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Solution

The fourth proportional to 20,319.18, 28,040.34 and 11,366.70 is: 15,685.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.18 : 28,040.34 = 11,366.70 : x
  2. Step 2: Convert to fraction form
    20,319.18/28,040.34 = 11,366.70/x
  3. Step 3: Cross multiply
    20,319.18x = 28,040.34 × 11,366.70
  4. Step 4: Simplify right side
    20,319.18x = 318,726,132.68
  5. Step 5: Solve for x
    x = 318,726,132.68/20,319.18
  6. Step 6: Final answer
    x = 15,685.97

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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.