Home / 2,812.50-3,882.81-1,869.57

Finding the Fourth Proportional to 2,812.50, 3,882.81 and 1,869.57

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Solution

The fourth proportional to 2,812.50, 3,882.81 and 1,869.57 is: 2,581.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.50 : 3,882.81 = 1,869.57 : x
  2. Step 2: Convert to fraction form
    2,812.50/3,882.81 = 1,869.57/x
  3. Step 3: Cross multiply
    2,812.50x = 3,882.81 × 1,869.57
  4. Step 4: Simplify right side
    2,812.50x = 7,259,185.09
  5. Step 5: Solve for x
    x = 7,259,185.09/2,812.50
  6. Step 6: Final answer
    x = 2,581.04

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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.