Home / 20,319.50-28,040.13-11,367.83

Finding the Fourth Proportional to 20,319.50, 28,040.13 and 11,367.83

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Solution

The fourth proportional to 20,319.50, 28,040.13 and 11,367.83 is: 15,687.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.50 : 28,040.13 = 11,367.83 : x
  2. Step 2: Convert to fraction form
    20,319.50/28,040.13 = 11,367.83/x
  3. Step 3: Cross multiply
    20,319.50x = 28,040.13 × 11,367.83
  4. Step 4: Simplify right side
    20,319.50x = 318,755,431.02
  5. Step 5: Solve for x
    x = 318,755,431.02/20,319.50
  6. Step 6: Final answer
    x = 15,687.17

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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.