Home / 5,135.92-7,122.72-4,815.16

Finding the Fourth Proportional to 5,135.92, 7,122.72 and 4,815.16

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Solution

The fourth proportional to 5,135.92, 7,122.72 and 4,815.16 is: 6,677.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.92 : 7,122.72 = 4,815.16 : x
  2. Step 2: Convert to fraction form
    5,135.92/7,122.72 = 4,815.16/x
  3. Step 3: Cross multiply
    5,135.92x = 7,122.72 × 4,815.16
  4. Step 4: Simplify right side
    5,135.92x = 34,297,036.44
  5. Step 5: Solve for x
    x = 34,297,036.44/5,135.92
  6. Step 6: Final answer
    x = 6,677.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.