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Finding the Fourth Proportional to 18,531.40, 27,800.70 and 8,001.40

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Solution

The fourth proportional to 18,531.40, 27,800.70 and 8,001.40 is: 12,003.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,531.40 : 27,800.70 = 8,001.40 : x
  2. Step 2: Convert to fraction form
    18,531.40/27,800.70 = 8,001.40/x
  3. Step 3: Cross multiply
    18,531.40x = 27,800.70 × 8,001.40
  4. Step 4: Simplify right side
    18,531.40x = 222,444,520.98
  5. Step 5: Solve for x
    x = 222,444,520.98/18,531.40
  6. Step 6: Final answer
    x = 12,003.65

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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.