Home / 20,736.42-28,616.04-11,304.78

Finding the Fourth Proportional to 20,736.42, 28,616.04 and 11,304.78

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Solution

The fourth proportional to 20,736.42, 28,616.04 and 11,304.78 is: 15,600.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.42 : 28,616.04 = 11,304.78 : x
  2. Step 2: Convert to fraction form
    20,736.42/28,616.04 = 11,304.78/x
  3. Step 3: Cross multiply
    20,736.42x = 28,616.04 × 11,304.78
  4. Step 4: Simplify right side
    20,736.42x = 323,498,036.67
  5. Step 5: Solve for x
    x = 323,498,036.67/20,736.42
  6. Step 6: Final answer
    x = 15,600.48

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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.