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Finding the Fourth Proportional to 18,239.40, 27,380.70 and 18,109.80

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Solution

The fourth proportional to 18,239.40, 27,380.70 and 18,109.80 is: 27,186.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,239.40 : 27,380.70 = 18,109.80 : x
  2. Step 2: Convert to fraction form
    18,239.40/27,380.70 = 18,109.80/x
  3. Step 3: Cross multiply
    18,239.40x = 27,380.70 × 18,109.80
  4. Step 4: Simplify right side
    18,239.40x = 495,859,000.86
  5. Step 5: Solve for x
    x = 495,859,000.86/18,239.40
  6. Step 6: Final answer
    x = 27,186.15

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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.