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Finding the Fourth Proportional to 8,928.74, 12,324.22 and 5,392.20

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Solution

The fourth proportional to 8,928.74, 12,324.22 and 5,392.20 is: 7,442.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928.74 : 12,324.22 = 5,392.20 : x
  2. Step 2: Convert to fraction form
    8,928.74/12,324.22 = 5,392.20/x
  3. Step 3: Cross multiply
    8,928.74x = 12,324.22 × 5,392.20
  4. Step 4: Simplify right side
    8,928.74x = 66,454,659.08
  5. Step 5: Solve for x
    x = 66,454,659.08/8,928.74
  6. Step 6: Final answer
    x = 7,442.78

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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.