Home / 2,812.12-3,880.76-1,553.20

Finding the Fourth Proportional to 2,812.12, 3,880.76 and 1,553.20

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Solution

The fourth proportional to 2,812.12, 3,880.76 and 1,553.20 is: 2,143.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.12 : 3,880.76 = 1,553.20 : x
  2. Step 2: Convert to fraction form
    2,812.12/3,880.76 = 1,553.20/x
  3. Step 3: Cross multiply
    2,812.12x = 3,880.76 × 1,553.20
  4. Step 4: Simplify right side
    2,812.12x = 6,027,596.43
  5. Step 5: Solve for x
    x = 6,027,596.43/2,812.12
  6. Step 6: Final answer
    x = 2,143.43

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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.