Home / 7,815.20-11,714.88-2,616.80

Finding the Fourth Proportional to 7,815.20, 11,714.88 and 2,616.80

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Solution

The fourth proportional to 7,815.20, 11,714.88 and 2,616.80 is: 3,922.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.20 : 11,714.88 = 2,616.80 : x
  2. Step 2: Convert to fraction form
    7,815.20/11,714.88 = 2,616.80/x
  3. Step 3: Cross multiply
    7,815.20x = 11,714.88 × 2,616.80
  4. Step 4: Simplify right side
    7,815.20x = 30,655,497.98
  5. Step 5: Solve for x
    x = 30,655,497.98/7,815.20
  6. Step 6: Final answer
    x = 3,922.55

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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.