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Finding the Fourth Proportional to 3,894, 5,373.71 and 2,125.61

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Solution

The fourth proportional to 3,894, 5,373.71 and 2,125.61 is: 2,933.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894 : 5,373.71 = 2,125.61 : x
  2. Step 2: Convert to fraction form
    3,894/5,373.71 = 2,125.61/x
  3. Step 3: Cross multiply
    3,894x = 5,373.71 × 2,125.61
  4. Step 4: Simplify right side
    3,894x = 11,422,384.84
  5. Step 5: Solve for x
    x = 11,422,384.84/3,894
  6. Step 6: Final answer
    x = 2,933.33

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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.