Home / 5,172.82-7,138.40-2,873.13

Finding the Fourth Proportional to 5,172.82, 7,138.40 and 2,873.13

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Solution

The fourth proportional to 5,172.82, 7,138.40 and 2,873.13 is: 3,964.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.82 : 7,138.40 = 2,873.13 : x
  2. Step 2: Convert to fraction form
    5,172.82/7,138.40 = 2,873.13/x
  3. Step 3: Cross multiply
    5,172.82x = 7,138.40 × 2,873.13
  4. Step 4: Simplify right side
    5,172.82x = 20,509,536.83
  5. Step 5: Solve for x
    x = 20,509,536.83/5,172.82
  6. Step 6: Final answer
    x = 3,964.87

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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.