Home / 2,812.50-3,881.39-1,553.75

Finding the Fourth Proportional to 2,812.50, 3,881.39 and 1,553.75

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Solution

The fourth proportional to 2,812.50, 3,881.39 and 1,553.75 is: 2,144.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.50 : 3,881.39 = 1,553.75 : x
  2. Step 2: Convert to fraction form
    2,812.50/3,881.39 = 1,553.75/x
  3. Step 3: Cross multiply
    2,812.50x = 3,881.39 × 1,553.75
  4. Step 4: Simplify right side
    2,812.50x = 6,030,682.54
  5. Step 5: Solve for x
    x = 6,030,682.54/2,812.50
  6. Step 6: Final answer
    x = 2,144.24

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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.