Home / 3,972.06-5,478.35-2,643.45

Finding the Fourth Proportional to 3,972.06, 5,478.35 and 2,643.45

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Solution

The fourth proportional to 3,972.06, 5,478.35 and 2,643.45 is: 3,645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972.06 : 5,478.35 = 2,643.45 : x
  2. Step 2: Convert to fraction form
    3,972.06/5,478.35 = 2,643.45/x
  3. Step 3: Cross multiply
    3,972.06x = 5,478.35 × 2,643.45
  4. Step 4: Simplify right side
    3,972.06x = 14,481,744.31
  5. Step 5: Solve for x
    x = 14,481,744.31/3,972.06
  6. Step 6: Final answer
    x = 3,645.90

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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.