Home / 13,186.81-19,780.36-3,326.09

Finding the Fourth Proportional to 13,186.81, 19,780.36 and 3,326.09

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Solution

The fourth proportional to 13,186.81, 19,780.36 and 3,326.09 is: 4,989.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.81 : 19,780.36 = 3,326.09 : x
  2. Step 2: Convert to fraction form
    13,186.81/19,780.36 = 3,326.09/x
  3. Step 3: Cross multiply
    13,186.81x = 19,780.36 × 3,326.09
  4. Step 4: Simplify right side
    13,186.81x = 65,791,150.38
  5. Step 5: Solve for x
    x = 65,791,150.38/13,186.81
  6. Step 6: Final answer
    x = 4,989.16

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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.