Home / 2,812.30-3,880.92-1,553.35

Finding the Fourth Proportional to 2,812.30, 3,880.92 and 1,553.35

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Solution

The fourth proportional to 2,812.30, 3,880.92 and 1,553.35 is: 2,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.30 : 3,880.92 = 1,553.35 : x
  2. Step 2: Convert to fraction form
    2,812.30/3,880.92 = 1,553.35/x
  3. Step 3: Cross multiply
    2,812.30x = 3,880.92 × 1,553.35
  4. Step 4: Simplify right side
    2,812.30x = 6,028,427.08
  5. Step 5: Solve for x
    x = 6,028,427.08/2,812.30
  6. Step 6: Final answer
    x = 2,143.60

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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.