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Finding the Fourth Proportional to 8,406.89, 12,621.12 and 5,249.26

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Solution

The fourth proportional to 8,406.89, 12,621.12 and 5,249.26 is: 7,880.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,406.89 : 12,621.12 = 5,249.26 : x
  2. Step 2: Convert to fraction form
    8,406.89/12,621.12 = 5,249.26/x
  3. Step 3: Cross multiply
    8,406.89x = 12,621.12 × 5,249.26
  4. Step 4: Simplify right side
    8,406.89x = 66,251,465.47
  5. Step 5: Solve for x
    x = 66,251,465.47/8,406.89
  6. Step 6: Final answer
    x = 7,880.62

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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.