Home / 5,278.50-7,917.75-1,815.75

Finding the Fourth Proportional to 5,278.50, 7,917.75 and 1,815.75

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Solution

The fourth proportional to 5,278.50, 7,917.75 and 1,815.75 is: 2,723.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.50 : 7,917.75 = 1,815.75 : x
  2. Step 2: Convert to fraction form
    5,278.50/7,917.75 = 1,815.75/x
  3. Step 3: Cross multiply
    5,278.50x = 7,917.75 × 1,815.75
  4. Step 4: Simplify right side
    5,278.50x = 14,376,654.56
  5. Step 5: Solve for x
    x = 14,376,654.56/5,278.50
  6. Step 6: Final answer
    x = 2,723.63

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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.