Home / 18,720.11-28,092.24-12,055.91

Finding the Fourth Proportional to 18,720.11, 28,092.24 and 12,055.91

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Solution

The fourth proportional to 18,720.11, 28,092.24 and 12,055.91 is: 18,091.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.11 : 28,092.24 = 12,055.91 : x
  2. Step 2: Convert to fraction form
    18,720.11/28,092.24 = 12,055.91/x
  3. Step 3: Cross multiply
    18,720.11x = 28,092.24 × 12,055.91
  4. Step 4: Simplify right side
    18,720.11x = 338,677,647.61
  5. Step 5: Solve for x
    x = 338,677,647.61/18,720.11
  6. Step 6: Final answer
    x = 18,091.65

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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.