Home / 2,812.17-3,880.78-1,553.31

Finding the Fourth Proportional to 2,812.17, 3,880.78 and 1,553.31

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Solution

The fourth proportional to 2,812.17, 3,880.78 and 1,553.31 is: 2,143.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.17 : 3,880.78 = 1,553.31 : x
  2. Step 2: Convert to fraction form
    2,812.17/3,880.78 = 1,553.31/x
  3. Step 3: Cross multiply
    2,812.17x = 3,880.78 × 1,553.31
  4. Step 4: Simplify right side
    2,812.17x = 6,028,054.38
  5. Step 5: Solve for x
    x = 6,028,054.38/2,812.17
  6. Step 6: Final answer
    x = 2,143.56

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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.