Home / 20,613.31-28,446.35-11,181.87

Finding the Fourth Proportional to 20,613.31, 28,446.35 and 11,181.87

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Solution

The fourth proportional to 20,613.31, 28,446.35 and 11,181.87 is: 15,430.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.31 : 28,446.35 = 11,181.87 : x
  2. Step 2: Convert to fraction form
    20,613.31/28,446.35 = 11,181.87/x
  3. Step 3: Cross multiply
    20,613.31x = 28,446.35 × 11,181.87
  4. Step 4: Simplify right side
    20,613.31x = 318,083,331.77
  5. Step 5: Solve for x
    x = 318,083,331.77/20,613.31
  6. Step 6: Final answer
    x = 15,430.97

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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.