Home / 20,861.14-28,781.04-11,902.18

Finding the Fourth Proportional to 20,861.14, 28,781.04 and 11,902.18

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Solution

The fourth proportional to 20,861.14, 28,781.04 and 11,902.18 is: 16,420.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.14 : 28,781.04 = 11,902.18 : x
  2. Step 2: Convert to fraction form
    20,861.14/28,781.04 = 11,902.18/x
  3. Step 3: Cross multiply
    20,861.14x = 28,781.04 × 11,902.18
  4. Step 4: Simplify right side
    20,861.14x = 342,557,118.67
  5. Step 5: Solve for x
    x = 342,557,118.67/20,861.14
  6. Step 6: Final answer
    x = 16,420.82

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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.