Home / 18,741.78-28,116.72-8,739.29

Finding the Fourth Proportional to 18,741.78, 28,116.72 and 8,739.29

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Solution

The fourth proportional to 18,741.78, 28,116.72 and 8,739.29 is: 13,110.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,741.78 : 28,116.72 = 8,739.29 : x
  2. Step 2: Convert to fraction form
    18,741.78/28,116.72 = 8,739.29/x
  3. Step 3: Cross multiply
    18,741.78x = 28,116.72 × 8,739.29
  4. Step 4: Simplify right side
    18,741.78x = 245,720,240.22
  5. Step 5: Solve for x
    x = 245,720,240.22/18,741.78
  6. Step 6: Final answer
    x = 13,110.83

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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.