Home / 12,087.66-18,118.29-4,689.90

Finding the Fourth Proportional to 12,087.66, 18,118.29 and 4,689.90

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Solution

The fourth proportional to 12,087.66, 18,118.29 and 4,689.90 is: 7,029.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.66 : 18,118.29 = 4,689.90 : x
  2. Step 2: Convert to fraction form
    12,087.66/18,118.29 = 4,689.90/x
  3. Step 3: Cross multiply
    12,087.66x = 18,118.29 × 4,689.90
  4. Step 4: Simplify right side
    12,087.66x = 84,972,968.27
  5. Step 5: Solve for x
    x = 84,972,968.27/12,087.66
  6. Step 6: Final answer
    x = 7,029.73

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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.