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Finding the Fourth Proportional to 8,394.35, 12,641.50 and 7,311.79

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Solution

The fourth proportional to 8,394.35, 12,641.50 and 7,311.79 is: 11,011.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,394.35 : 12,641.50 = 7,311.79 : x
  2. Step 2: Convert to fraction form
    8,394.35/12,641.50 = 7,311.79/x
  3. Step 3: Cross multiply
    8,394.35x = 12,641.50 × 7,311.79
  4. Step 4: Simplify right side
    8,394.35x = 92,431,993.29
  5. Step 5: Solve for x
    x = 92,431,993.29/8,394.35
  6. Step 6: Final answer
    x = 11,011.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.