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Finding the Fourth Proportional to 3,801.78, 5,247.11 and 2,809.93

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Solution

The fourth proportional to 3,801.78, 5,247.11 and 2,809.93 is: 3,878.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,801.78 : 5,247.11 = 2,809.93 : x
  2. Step 2: Convert to fraction form
    3,801.78/5,247.11 = 2,809.93/x
  3. Step 3: Cross multiply
    3,801.78x = 5,247.11 × 2,809.93
  4. Step 4: Simplify right side
    3,801.78x = 14,744,011.80
  5. Step 5: Solve for x
    x = 14,744,011.80/3,801.78
  6. Step 6: Final answer
    x = 3,878.19

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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.