Home / 5,160.66-7,121.57-2,802.80

Finding the Fourth Proportional to 5,160.66, 7,121.57 and 2,802.80

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Solution

The fourth proportional to 5,160.66, 7,121.57 and 2,802.80 is: 3,867.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.66 : 7,121.57 = 2,802.80 : x
  2. Step 2: Convert to fraction form
    5,160.66/7,121.57 = 2,802.80/x
  3. Step 3: Cross multiply
    5,160.66x = 7,121.57 × 2,802.80
  4. Step 4: Simplify right side
    5,160.66x = 19,960,355.95
  5. Step 5: Solve for x
    x = 19,960,355.95/5,160.66
  6. Step 6: Final answer
    x = 3,867.79

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1.5x scale

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.