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Finding the Fourth Proportional to 8,394.35, 12,591.90 and 2,154.38

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Solution

The fourth proportional to 8,394.35, 12,591.90 and 2,154.38 is: 3,231.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,394.35 : 12,591.90 = 2,154.38 : x
  2. Step 2: Convert to fraction form
    8,394.35/12,591.90 = 2,154.38/x
  3. Step 3: Cross multiply
    8,394.35x = 12,591.90 × 2,154.38
  4. Step 4: Simplify right side
    8,394.35x = 27,127,674.56
  5. Step 5: Solve for x
    x = 27,127,674.56/8,394.35
  6. Step 6: Final answer
    x = 3,231.66

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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.