Home / 11,985.18-17,979.90-4,087.26

Finding the Fourth Proportional to 11,985.18, 17,979.90 and 4,087.26

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Solution

The fourth proportional to 11,985.18, 17,979.90 and 4,087.26 is: 6,131.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.18 : 17,979.90 = 4,087.26 : x
  2. Step 2: Convert to fraction form
    11,985.18/17,979.90 = 4,087.26/x
  3. Step 3: Cross multiply
    11,985.18x = 17,979.90 × 4,087.26
  4. Step 4: Simplify right side
    11,985.18x = 73,488,526.07
  5. Step 5: Solve for x
    x = 73,488,526.07/11,985.18
  6. Step 6: Final answer
    x = 6,131.62

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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.