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Finding the Fourth Proportional to 12,387.99, 18,591.11 and 8,226.62

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Solution

The fourth proportional to 12,387.99, 18,591.11 and 8,226.62 is: 12,345.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.99 : 18,591.11 = 8,226.62 : x
  2. Step 2: Convert to fraction form
    12,387.99/18,591.11 = 8,226.62/x
  3. Step 3: Cross multiply
    12,387.99x = 18,591.11 × 8,226.62
  4. Step 4: Simplify right side
    12,387.99x = 152,941,863.26
  5. Step 5: Solve for x
    x = 152,941,863.26/12,387.99
  6. Step 6: Final answer
    x = 12,345.98

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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.