Home / 5,815.65-8,721.98-2,117.56

Finding the Fourth Proportional to 5,815.65, 8,721.98 and 2,117.56

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Solution

The fourth proportional to 5,815.65, 8,721.98 and 2,117.56 is: 3,175.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,815.65 : 8,721.98 = 2,117.56 : x
  2. Step 2: Convert to fraction form
    5,815.65/8,721.98 = 2,117.56/x
  3. Step 3: Cross multiply
    5,815.65x = 8,721.98 × 2,117.56
  4. Step 4: Simplify right side
    5,815.65x = 18,469,315.97
  5. Step 5: Solve for x
    x = 18,469,315.97/5,815.65
  6. Step 6: Final answer
    x = 3,175.80

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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.