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Finding the Fourth Proportional to 22,479.80, 33,719.70 and 7,689.20

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Solution

The fourth proportional to 22,479.80, 33,719.70 and 7,689.20 is: 11,533.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,479.80 : 33,719.70 = 7,689.20 : x
  2. Step 2: Convert to fraction form
    22,479.80/33,719.70 = 7,689.20/x
  3. Step 3: Cross multiply
    22,479.80x = 33,719.70 × 7,689.20
  4. Step 4: Simplify right side
    22,479.80x = 259,277,517.24
  5. Step 5: Solve for x
    x = 259,277,517.24/22,479.80
  6. Step 6: Final answer
    x = 11,533.80

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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.