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Finding the Fourth Proportional to 3,876.88, 5,354.90 and 2,812.94

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Solution

The fourth proportional to 3,876.88, 5,354.90 and 2,812.94 is: 3,885.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.88 : 5,354.90 = 2,812.94 : x
  2. Step 2: Convert to fraction form
    3,876.88/5,354.90 = 2,812.94/x
  3. Step 3: Cross multiply
    3,876.88x = 5,354.90 × 2,812.94
  4. Step 4: Simplify right side
    3,876.88x = 15,063,040.51
  5. Step 5: Solve for x
    x = 15,063,040.51/3,876.88
  6. Step 6: Final answer
    x = 3,885.35

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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.