Home / 12,159.12-18,239.49-3,839.48

Finding the Fourth Proportional to 12,159.12, 18,239.49 and 3,839.48

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Solution

The fourth proportional to 12,159.12, 18,239.49 and 3,839.48 is: 5,759.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.12 : 18,239.49 = 3,839.48 : x
  2. Step 2: Convert to fraction form
    12,159.12/18,239.49 = 3,839.48/x
  3. Step 3: Cross multiply
    12,159.12x = 18,239.49 × 3,839.48
  4. Step 4: Simplify right side
    12,159.12x = 70,030,065.87
  5. Step 5: Solve for x
    x = 70,030,065.87/12,159.12
  6. Step 6: Final answer
    x = 5,759.47

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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.