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Finding the Fourth Proportional to 8,661.74, 12,991.19 and 2,422.17

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Solution

The fourth proportional to 8,661.74, 12,991.19 and 2,422.17 is: 3,632.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.74 : 12,991.19 = 2,422.17 : x
  2. Step 2: Convert to fraction form
    8,661.74/12,991.19 = 2,422.17/x
  3. Step 3: Cross multiply
    8,661.74x = 12,991.19 × 2,422.17
  4. Step 4: Simplify right side
    8,661.74x = 31,466,858.57
  5. Step 5: Solve for x
    x = 31,466,858.57/8,661.74
  6. Step 6: Final answer
    x = 3,632.86

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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.