Home / 5,142.92-7,715.78-1,680.17

Finding the Fourth Proportional to 5,142.92, 7,715.78 and 1,680.17

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Solution

The fourth proportional to 5,142.92, 7,715.78 and 1,680.17 is: 2,520.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,142.92 : 7,715.78 = 1,680.17 : x
  2. Step 2: Convert to fraction form
    5,142.92/7,715.78 = 1,680.17/x
  3. Step 3: Cross multiply
    5,142.92x = 7,715.78 × 1,680.17
  4. Step 4: Simplify right side
    5,142.92x = 12,963,813.68
  5. Step 5: Solve for x
    x = 12,963,813.68/5,142.92
  6. Step 6: Final answer
    x = 2,520.71

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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.