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Finding the Fourth Proportional to 22,217.70, 30,660.75 and 12,659.70

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Solution

The fourth proportional to 22,217.70, 30,660.75 and 12,659.70 is: 17,470.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,217.70 : 30,660.75 = 12,659.70 : x
  2. Step 2: Convert to fraction form
    22,217.70/30,660.75 = 12,659.70/x
  3. Step 3: Cross multiply
    22,217.70x = 30,660.75 × 12,659.70
  4. Step 4: Simplify right side
    22,217.70x = 388,155,896.78
  5. Step 5: Solve for x
    x = 388,155,896.78/22,217.70
  6. Step 6: Final answer
    x = 17,470.57

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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.