Home / 20,613.17-28,446.23-11,181.80

Finding the Fourth Proportional to 20,613.17, 28,446.23 and 11,181.80

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Solution

The fourth proportional to 20,613.17, 28,446.23 and 11,181.80 is: 15,430.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.17 : 28,446.23 = 11,181.80 : x
  2. Step 2: Convert to fraction form
    20,613.17/28,446.23 = 11,181.80/x
  3. Step 3: Cross multiply
    20,613.17x = 28,446.23 × 11,181.80
  4. Step 4: Simplify right side
    20,613.17x = 318,079,940.34
  5. Step 5: Solve for x
    x = 318,079,940.34/20,613.17
  6. Step 6: Final answer
    x = 15,430.91

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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.