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Finding the Fourth Proportional to 20,039.98, 27,650.20 and 12,957.88

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Solution

The fourth proportional to 20,039.98, 27,650.20 and 12,957.88 is: 17,878.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,039.98 : 27,650.20 = 12,957.88 : x
  2. Step 2: Convert to fraction form
    20,039.98/27,650.20 = 12,957.88/x
  3. Step 3: Cross multiply
    20,039.98x = 27,650.20 × 12,957.88
  4. Step 4: Simplify right side
    20,039.98x = 358,287,770.54
  5. Step 5: Solve for x
    x = 358,287,770.54/20,039.98
  6. Step 6: Final answer
    x = 17,878.65

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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.