Home / 8,405.79-12,610.35-2,857.65

Finding the Fourth Proportional to 8,405.79, 12,610.35 and 2,857.65

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Solution

The fourth proportional to 8,405.79, 12,610.35 and 2,857.65 is: 4,287.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.79 : 12,610.35 = 2,857.65 : x
  2. Step 2: Convert to fraction form
    8,405.79/12,610.35 = 2,857.65/x
  3. Step 3: Cross multiply
    8,405.79x = 12,610.35 × 2,857.65
  4. Step 4: Simplify right side
    8,405.79x = 36,035,919.39
  5. Step 5: Solve for x
    x = 36,035,919.39/8,405.79
  6. Step 6: Final answer
    x = 4,287.04

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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.