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Finding the Fourth Proportional to 8,191.68, 12,285.12 and 3,259.68

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Solution

The fourth proportional to 8,191.68, 12,285.12 and 3,259.68 is: 4,888.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,191.68 : 12,285.12 = 3,259.68 : x
  2. Step 2: Convert to fraction form
    8,191.68/12,285.12 = 3,259.68/x
  3. Step 3: Cross multiply
    8,191.68x = 12,285.12 × 3,259.68
  4. Step 4: Simplify right side
    8,191.68x = 40,045,559.96
  5. Step 5: Solve for x
    x = 40,045,559.96/8,191.68
  6. Step 6: Final answer
    x = 4,888.56

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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.