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Finding the Fourth Proportional to 18,117.70, 27,140.10 and 12,212.80

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Solution

The fourth proportional to 18,117.70, 27,140.10 and 12,212.80 is: 18,294.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117.70 : 27,140.10 = 12,212.80 : x
  2. Step 2: Convert to fraction form
    18,117.70/27,140.10 = 12,212.80/x
  3. Step 3: Cross multiply
    18,117.70x = 27,140.10 × 12,212.80
  4. Step 4: Simplify right side
    18,117.70x = 331,456,613.28
  5. Step 5: Solve for x
    x = 331,456,613.28/18,117.70
  6. Step 6: Final answer
    x = 18,294.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.