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Finding the Fourth Proportional to 8,991.81, 12,410.19 and 6,863.85

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Solution

The fourth proportional to 8,991.81, 12,410.19 and 6,863.85 is: 9,473.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.81 : 12,410.19 = 6,863.85 : x
  2. Step 2: Convert to fraction form
    8,991.81/12,410.19 = 6,863.85/x
  3. Step 3: Cross multiply
    8,991.81x = 12,410.19 × 6,863.85
  4. Step 4: Simplify right side
    8,991.81x = 85,181,682.63
  5. Step 5: Solve for x
    x = 85,181,682.63/8,991.81
  6. Step 6: Final answer
    x = 9,473.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.