Home / 7,874.28-11,795.22-5,687.40

Finding the Fourth Proportional to 7,874.28, 11,795.22 and 5,687.40

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Solution

The fourth proportional to 7,874.28, 11,795.22 and 5,687.40 is: 8,519.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,874.28 : 11,795.22 = 5,687.40 : x
  2. Step 2: Convert to fraction form
    7,874.28/11,795.22 = 5,687.40/x
  3. Step 3: Cross multiply
    7,874.28x = 11,795.22 × 5,687.40
  4. Step 4: Simplify right side
    7,874.28x = 67,084,134.23
  5. Step 5: Solve for x
    x = 67,084,134.23/7,874.28
  6. Step 6: Final answer
    x = 8,519.40

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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.