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Finding the Fourth Proportional to 8,345.87, 12,517.99 and 2,189.87

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Solution

The fourth proportional to 8,345.87, 12,517.99 and 2,189.87 is: 3,284.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,345.87 : 12,517.99 = 2,189.87 : x
  2. Step 2: Convert to fraction form
    8,345.87/12,517.99 = 2,189.87/x
  3. Step 3: Cross multiply
    8,345.87x = 12,517.99 × 2,189.87
  4. Step 4: Simplify right side
    8,345.87x = 27,412,697.22
  5. Step 5: Solve for x
    x = 27,412,697.22/8,345.87
  6. Step 6: Final answer
    x = 3,284.58

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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.