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Finding the Fourth Proportional to 3,893, 5,372.54 and 2,124.72

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Solution

The fourth proportional to 3,893, 5,372.54 and 2,124.72 is: 2,932.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,893 : 5,372.54 = 2,124.72 : x
  2. Step 2: Convert to fraction form
    3,893/5,372.54 = 2,124.72/x
  3. Step 3: Cross multiply
    3,893x = 5,372.54 × 2,124.72
  4. Step 4: Simplify right side
    3,893x = 11,415,143.19
  5. Step 5: Solve for x
    x = 11,415,143.19/3,893
  6. Step 6: Final answer
    x = 2,932.22

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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.