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Finding the Fourth Proportional to 3,894.04, 5,373.80 and 2,125.64

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Solution

The fourth proportional to 3,894.04, 5,373.80 and 2,125.64 is: 2,933.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.04 : 5,373.80 = 2,125.64 : x
  2. Step 2: Convert to fraction form
    3,894.04/5,373.80 = 2,125.64/x
  3. Step 3: Cross multiply
    3,894.04x = 5,373.80 × 2,125.64
  4. Step 4: Simplify right side
    3,894.04x = 11,422,764.23
  5. Step 5: Solve for x
    x = 11,422,764.23/3,894.04
  6. Step 6: Final answer
    x = 2,933.40

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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.