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Finding the Fourth Proportional to 3,877.63, 5,365.21 and 3,381.30

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Solution

The fourth proportional to 3,877.63, 5,365.21 and 3,381.30 is: 4,678.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,877.63 : 5,365.21 = 3,381.30 : x
  2. Step 2: Convert to fraction form
    3,877.63/5,365.21 = 3,381.30/x
  3. Step 3: Cross multiply
    3,877.63x = 5,365.21 × 3,381.30
  4. Step 4: Simplify right side
    3,877.63x = 18,141,384.57
  5. Step 5: Solve for x
    x = 18,141,384.57/3,877.63
  6. Step 6: Final answer
    x = 4,678.47

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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.