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Finding the Fourth Proportional to 22,287.80, 33,431.70 and 9,138.80

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Solution

The fourth proportional to 22,287.80, 33,431.70 and 9,138.80 is: 13,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,287.80 : 33,431.70 = 9,138.80 : x
  2. Step 2: Convert to fraction form
    22,287.80/33,431.70 = 9,138.80/x
  3. Step 3: Cross multiply
    22,287.80x = 33,431.70 × 9,138.80
  4. Step 4: Simplify right side
    22,287.80x = 305,525,619.96
  5. Step 5: Solve for x
    x = 305,525,619.96/22,287.80
  6. Step 6: Final answer
    x = 13,708.20

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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.