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Finding the Fourth Proportional to 9,026.28, 12,480.48 and 7,919.28

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Solution

The fourth proportional to 9,026.28, 12,480.48 and 7,919.28 is: 10,949.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,026.28 : 12,480.48 = 7,919.28 : x
  2. Step 2: Convert to fraction form
    9,026.28/12,480.48 = 7,919.28/x
  3. Step 3: Cross multiply
    9,026.28x = 12,480.48 × 7,919.28
  4. Step 4: Simplify right side
    9,026.28x = 98,836,415.65
  5. Step 5: Solve for x
    x = 98,836,415.65/9,026.28
  6. Step 6: Final answer
    x = 10,949.85

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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.