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Finding the Fourth Proportional to 8,867.97, 12,231.65 and 7,189.44

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Solution

The fourth proportional to 8,867.97, 12,231.65 and 7,189.44 is: 9,916.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,867.97 : 12,231.65 = 7,189.44 : x
  2. Step 2: Convert to fraction form
    8,867.97/12,231.65 = 7,189.44/x
  3. Step 3: Cross multiply
    8,867.97x = 12,231.65 × 7,189.44
  4. Step 4: Simplify right side
    8,867.97x = 87,938,677.83
  5. Step 5: Solve for x
    x = 87,938,677.83/8,867.97
  6. Step 6: Final answer
    x = 9,916.44

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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.