Home / 2,812.79-3,881.61-1,553.85

Finding the Fourth Proportional to 2,812.79, 3,881.61 and 1,553.85

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Solution

The fourth proportional to 2,812.79, 3,881.61 and 1,553.85 is: 2,144.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.79 : 3,881.61 = 1,553.85 : x
  2. Step 2: Convert to fraction form
    2,812.79/3,881.61 = 1,553.85/x
  3. Step 3: Cross multiply
    2,812.79x = 3,881.61 × 1,553.85
  4. Step 4: Simplify right side
    2,812.79x = 6,031,439.70
  5. Step 5: Solve for x
    x = 6,031,439.70/2,812.79
  6. Step 6: Final answer
    x = 2,144.29

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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.