Home / 5,120.57-7,680.83-2,927.75

Finding the Fourth Proportional to 5,120.57, 7,680.83 and 2,927.75

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Solution

The fourth proportional to 5,120.57, 7,680.83 and 2,927.75 is: 4,391.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.57 : 7,680.83 = 2,927.75 : x
  2. Step 2: Convert to fraction form
    5,120.57/7,680.83 = 2,927.75/x
  3. Step 3: Cross multiply
    5,120.57x = 7,680.83 × 2,927.75
  4. Step 4: Simplify right side
    5,120.57x = 22,487,496.99
  5. Step 5: Solve for x
    x = 22,487,496.99/5,120.57
  6. Step 6: Final answer
    x = 4,391.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.