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Finding the Fourth Proportional to 11,124.78, 16,689.02 and 5,278.20

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Solution

The fourth proportional to 11,124.78, 16,689.02 and 5,278.20 is: 7,918.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,124.78 : 16,689.02 = 5,278.20 : x
  2. Step 2: Convert to fraction form
    11,124.78/16,689.02 = 5,278.20/x
  3. Step 3: Cross multiply
    11,124.78x = 16,689.02 × 5,278.20
  4. Step 4: Simplify right side
    11,124.78x = 88,087,958.97
  5. Step 5: Solve for x
    x = 88,087,958.97/11,124.78
  6. Step 6: Final answer
    x = 7,918.18

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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.