Home / 5,278.80-7,913.44-2,815.36

Finding the Fourth Proportional to 5,278.80, 7,913.44 and 2,815.36

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Solution

The fourth proportional to 5,278.80, 7,913.44 and 2,815.36 is: 4,220.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.80 : 7,913.44 = 2,815.36 : x
  2. Step 2: Convert to fraction form
    5,278.80/7,913.44 = 2,815.36/x
  3. Step 3: Cross multiply
    5,278.80x = 7,913.44 × 2,815.36
  4. Step 4: Simplify right side
    5,278.80x = 22,279,182.44
  5. Step 5: Solve for x
    x = 22,279,182.44/5,278.80
  6. Step 6: Final answer
    x = 4,220.50

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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.