Home / 3,968.80-5,943.78-2,115.32

Finding the Fourth Proportional to 3,968.80, 5,943.78 and 2,115.32

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Solution

The fourth proportional to 3,968.80, 5,943.78 and 2,115.32 is: 3,167.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,968.80 : 5,943.78 = 2,115.32 : x
  2. Step 2: Convert to fraction form
    3,968.80/5,943.78 = 2,115.32/x
  3. Step 3: Cross multiply
    3,968.80x = 5,943.78 × 2,115.32
  4. Step 4: Simplify right side
    3,968.80x = 12,572,966.99
  5. Step 5: Solve for x
    x = 12,572,966.99/3,968.80
  6. Step 6: Final answer
    x = 3,167.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.