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Finding the Fourth Proportional to 3,892.84, 5,372.12 and 2,124.54

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Solution

The fourth proportional to 3,892.84, 5,372.12 and 2,124.54 is: 2,931.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,892.84 : 5,372.12 = 2,124.54 : x
  2. Step 2: Convert to fraction form
    3,892.84/5,372.12 = 2,124.54/x
  3. Step 3: Cross multiply
    3,892.84x = 5,372.12 × 2,124.54
  4. Step 4: Simplify right side
    3,892.84x = 11,413,283.82
  5. Step 5: Solve for x
    x = 11,413,283.82/3,892.84
  6. Step 6: Final answer
    x = 2,931.87

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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.