Home / 20,350.29-28,083.20-11,397.81

Finding the Fourth Proportional to 20,350.29, 28,083.20 and 11,397.81

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Solution

The fourth proportional to 20,350.29, 28,083.20 and 11,397.81 is: 15,728.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.29 : 28,083.20 = 11,397.81 : x
  2. Step 2: Convert to fraction form
    20,350.29/28,083.20 = 11,397.81/x
  3. Step 3: Cross multiply
    20,350.29x = 28,083.20 × 11,397.81
  4. Step 4: Simplify right side
    20,350.29x = 320,086,920.80
  5. Step 5: Solve for x
    x = 320,086,920.80/20,350.29
  6. Step 6: Final answer
    x = 15,728.86

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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.