Home / 20,612.82-28,445.49-11,181.18

Finding the Fourth Proportional to 20,612.82, 28,445.49 and 11,181.18

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Solution

The fourth proportional to 20,612.82, 28,445.49 and 11,181.18 is: 15,429.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.82 : 28,445.49 = 11,181.18 : x
  2. Step 2: Convert to fraction form
    20,612.82/28,445.49 = 11,181.18/x
  3. Step 3: Cross multiply
    20,612.82x = 28,445.49 × 11,181.18
  4. Step 4: Simplify right side
    20,612.82x = 318,054,143.88
  5. Step 5: Solve for x
    x = 318,054,143.88/20,612.82
  6. Step 6: Final answer
    x = 15,429.92

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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.