Home / 2,812.47-3,881.19-1,553.55

Finding the Fourth Proportional to 2,812.47, 3,881.19 and 1,553.55

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Solution

The fourth proportional to 2,812.47, 3,881.19 and 1,553.55 is: 2,143.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.47 : 3,881.19 = 1,553.55 : x
  2. Step 2: Convert to fraction form
    2,812.47/3,881.19 = 1,553.55/x
  3. Step 3: Cross multiply
    2,812.47x = 3,881.19 × 1,553.55
  4. Step 4: Simplify right side
    2,812.47x = 6,029,622.72
  5. Step 5: Solve for x
    x = 6,029,622.72/2,812.47
  6. Step 6: Final answer
    x = 2,143.89

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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.