Home / 5,172.96-7,138.75-2,815.10

Finding the Fourth Proportional to 5,172.96, 7,138.75 and 2,815.10

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Solution

The fourth proportional to 5,172.96, 7,138.75 and 2,815.10 is: 3,884.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.96 : 7,138.75 = 2,815.10 : x
  2. Step 2: Convert to fraction form
    5,172.96/7,138.75 = 2,815.10/x
  3. Step 3: Cross multiply
    5,172.96x = 7,138.75 × 2,815.10
  4. Step 4: Simplify right side
    5,172.96x = 20,096,295.13
  5. Step 5: Solve for x
    x = 20,096,295.13/5,172.96
  6. Step 6: Final answer
    x = 3,884.87

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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.