Home / 8,278.20-11,428.15-6,385.54

Finding the Fourth Proportional to 8,278.20, 11,428.15 and 6,385.54

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Solution

The fourth proportional to 8,278.20, 11,428.15 and 6,385.54 is: 8,815.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,278.20 : 11,428.15 = 6,385.54 : x
  2. Step 2: Convert to fraction form
    8,278.20/11,428.15 = 6,385.54/x
  3. Step 3: Cross multiply
    8,278.20x = 11,428.15 × 6,385.54
  4. Step 4: Simplify right side
    8,278.20x = 72,974,882.06
  5. Step 5: Solve for x
    x = 72,974,882.06/8,278.20
  6. Step 6: Final answer
    x = 8,815.31

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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.