Home / 8,278.50-11,428.56-6,385.83

Finding the Fourth Proportional to 8,278.50, 11,428.56 and 6,385.83

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Solution

The fourth proportional to 8,278.50, 11,428.56 and 6,385.83 is: 8,815.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,278.50 : 11,428.56 = 6,385.83 : x
  2. Step 2: Convert to fraction form
    8,278.50/11,428.56 = 6,385.83/x
  3. Step 3: Cross multiply
    8,278.50x = 11,428.56 × 6,385.83
  4. Step 4: Simplify right side
    8,278.50x = 72,980,912.84
  5. Step 5: Solve for x
    x = 72,980,912.84/8,278.50
  6. Step 6: Final answer
    x = 8,815.72

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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.