Home / 7,839.90-11,756.49-2,643.42

Finding the Fourth Proportional to 7,839.90, 11,756.49 and 2,643.42

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Solution

The fourth proportional to 7,839.90, 11,756.49 and 2,643.42 is: 3,964.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,839.90 : 11,756.49 = 2,643.42 : x
  2. Step 2: Convert to fraction form
    7,839.90/11,756.49 = 2,643.42/x
  3. Step 3: Cross multiply
    7,839.90x = 11,756.49 × 2,643.42
  4. Step 4: Simplify right side
    7,839.90x = 31,077,340.80
  5. Step 5: Solve for x
    x = 31,077,340.80/7,839.90
  6. Step 6: Final answer
    x = 3,964.00

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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.