Home / 3,972.56-5,479.04-2,643.95

Finding the Fourth Proportional to 3,972.56, 5,479.04 and 2,643.95

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Solution

The fourth proportional to 3,972.56, 5,479.04 and 2,643.95 is: 3,646.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972.56 : 5,479.04 = 2,643.95 : x
  2. Step 2: Convert to fraction form
    3,972.56/5,479.04 = 2,643.95/x
  3. Step 3: Cross multiply
    3,972.56x = 5,479.04 × 2,643.95
  4. Step 4: Simplify right side
    3,972.56x = 14,486,328.12
  5. Step 5: Solve for x
    x = 14,486,328.12/3,972.56
  6. Step 6: Final answer
    x = 3,646.60

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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.