Home / 2,812.32-3,880.92-1,553.40

Finding the Fourth Proportional to 2,812.32, 3,880.92 and 1,553.40

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Solution

The fourth proportional to 2,812.32, 3,880.92 and 1,553.40 is: 2,143.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.32 : 3,880.92 = 1,553.40 : x
  2. Step 2: Convert to fraction form
    2,812.32/3,880.92 = 1,553.40/x
  3. Step 3: Cross multiply
    2,812.32x = 3,880.92 × 1,553.40
  4. Step 4: Simplify right side
    2,812.32x = 6,028,621.13
  5. Step 5: Solve for x
    x = 6,028,621.13/2,812.32
  6. Step 6: Final answer
    x = 2,143.65

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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.