Home / 20,731.72-28,608.74-11,778.04

Finding the Fourth Proportional to 20,731.72, 28,608.74 and 11,778.04

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Solution

The fourth proportional to 20,731.72, 28,608.74 and 11,778.04 is: 16,253.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.72 : 28,608.74 = 11,778.04 : x
  2. Step 2: Convert to fraction form
    20,731.72/28,608.74 = 11,778.04/x
  3. Step 3: Cross multiply
    20,731.72x = 28,608.74 × 11,778.04
  4. Step 4: Simplify right side
    20,731.72x = 336,954,884.07
  5. Step 5: Solve for x
    x = 336,954,884.07/20,731.72
  6. Step 6: Final answer
    x = 16,253.11

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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.