Home / 20,728.72-28,604.60-11,775.04

Finding the Fourth Proportional to 20,728.72, 28,604.60 and 11,775.04

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Solution

The fourth proportional to 20,728.72, 28,604.60 and 11,775.04 is: 16,248.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.72 : 28,604.60 = 11,775.04 : x
  2. Step 2: Convert to fraction form
    20,728.72/28,604.60 = 11,775.04/x
  3. Step 3: Cross multiply
    20,728.72x = 28,604.60 × 11,775.04
  4. Step 4: Simplify right side
    20,728.72x = 336,820,309.18
  5. Step 5: Solve for x
    x = 336,820,309.18/20,728.72
  6. Step 6: Final answer
    x = 16,248.97

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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.