Home / 7,878.29-10,868.62-4,689.80

Finding the Fourth Proportional to 7,878.29, 10,868.62 and 4,689.80

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Solution

The fourth proportional to 7,878.29, 10,868.62 and 4,689.80 is: 6,469.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.29 : 10,868.62 = 4,689.80 : x
  2. Step 2: Convert to fraction form
    7,878.29/10,868.62 = 4,689.80/x
  3. Step 3: Cross multiply
    7,878.29x = 10,868.62 × 4,689.80
  4. Step 4: Simplify right side
    7,878.29x = 50,971,599.73
  5. Step 5: Solve for x
    x = 50,971,599.73/7,878.29
  6. Step 6: Final answer
    x = 6,469.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.