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Finding the Fourth Proportional to 22,750.80, 31,395.78 and 12,679.62

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Solution

The fourth proportional to 22,750.80, 31,395.78 and 12,679.62 is: 17,497.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,750.80 : 31,395.78 = 12,679.62 : x
  2. Step 2: Convert to fraction form
    22,750.80/31,395.78 = 12,679.62/x
  3. Step 3: Cross multiply
    22,750.80x = 31,395.78 × 12,679.62
  4. Step 4: Simplify right side
    22,750.80x = 398,086,560.00
  5. Step 5: Solve for x
    x = 398,086,560.00/22,750.80
  6. Step 6: Final answer
    x = 17,497.70

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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.