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Finding the Fourth Proportional to 8,866.12, 13,286.66 and 4,919.13

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Solution

The fourth proportional to 8,866.12, 13,286.66 and 4,919.13 is: 7,371.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,866.12 : 13,286.66 = 4,919.13 : x
  2. Step 2: Convert to fraction form
    8,866.12/13,286.66 = 4,919.13/x
  3. Step 3: Cross multiply
    8,866.12x = 13,286.66 × 4,919.13
  4. Step 4: Simplify right side
    8,866.12x = 65,358,807.81
  5. Step 5: Solve for x
    x = 65,358,807.81/8,866.12
  6. Step 6: Final answer
    x = 7,371.75

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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.