Home / 20,683.22-28,543.13-11,251.78

Finding the Fourth Proportional to 20,683.22, 28,543.13 and 11,251.78

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Solution

The fourth proportional to 20,683.22, 28,543.13 and 11,251.78 is: 15,527.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.22 : 28,543.13 = 11,251.78 : x
  2. Step 2: Convert to fraction form
    20,683.22/28,543.13 = 11,251.78/x
  3. Step 3: Cross multiply
    20,683.22x = 28,543.13 × 11,251.78
  4. Step 4: Simplify right side
    20,683.22x = 321,161,019.27
  5. Step 5: Solve for x
    x = 321,161,019.27/20,683.22
  6. Step 6: Final answer
    x = 15,527.61

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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.