Home / 5,172.92-7,138.72-2,815.06

Finding the Fourth Proportional to 5,172.92, 7,138.72 and 2,815.06

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Solution

The fourth proportional to 5,172.92, 7,138.72 and 2,815.06 is: 3,884.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.92 : 7,138.72 = 2,815.06 : x
  2. Step 2: Convert to fraction form
    5,172.92/7,138.72 = 2,815.06/x
  3. Step 3: Cross multiply
    5,172.92x = 7,138.72 × 2,815.06
  4. Step 4: Simplify right side
    5,172.92x = 20,095,925.12
  5. Step 5: Solve for x
    x = 20,095,925.12/5,172.92
  6. Step 6: Final answer
    x = 3,884.83

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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.