Home / 5,160.38-7,121.32-2,802.57

Finding the Fourth Proportional to 5,160.38, 7,121.32 and 2,802.57

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Solution

The fourth proportional to 5,160.38, 7,121.32 and 2,802.57 is: 3,867.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.38 : 7,121.32 = 2,802.57 : x
  2. Step 2: Convert to fraction form
    5,160.38/7,121.32 = 2,802.57/x
  3. Step 3: Cross multiply
    5,160.38x = 7,121.32 × 2,802.57
  4. Step 4: Simplify right side
    5,160.38x = 19,957,964.08
  5. Step 5: Solve for x
    x = 19,957,964.08/5,160.38
  6. Step 6: Final answer
    x = 3,867.54

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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.