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Finding the Fourth Proportional to 18,398.68, 27,600.78 and 8,538.98

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Solution

The fourth proportional to 18,398.68, 27,600.78 and 8,538.98 is: 12,809.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.68 : 27,600.78 = 8,538.98 : x
  2. Step 2: Convert to fraction form
    18,398.68/27,600.78 = 8,538.98/x
  3. Step 3: Cross multiply
    18,398.68x = 27,600.78 × 8,538.98
  4. Step 4: Simplify right side
    18,398.68x = 235,682,508.40
  5. Step 5: Solve for x
    x = 235,682,508.40/18,398.68
  6. Step 6: Final answer
    x = 12,809.75

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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.