Home / 2,812.32-3,880.91-1,553.45

Finding the Fourth Proportional to 2,812.32, 3,880.91 and 1,553.45

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Solution

The fourth proportional to 2,812.32, 3,880.91 and 1,553.45 is: 2,143.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.32 : 3,880.91 = 1,553.45 : x
  2. Step 2: Convert to fraction form
    2,812.32/3,880.91 = 1,553.45/x
  3. Step 3: Cross multiply
    2,812.32x = 3,880.91 × 1,553.45
  4. Step 4: Simplify right side
    2,812.32x = 6,028,784.12
  5. Step 5: Solve for x
    x = 6,028,784.12/2,812.32
  6. Step 6: Final answer
    x = 2,143.70

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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.