Home / 18,788.48-28,187.40-5,640.56

Finding the Fourth Proportional to 18,788.48, 28,187.40 and 5,640.56

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Solution

The fourth proportional to 18,788.48, 28,187.40 and 5,640.56 is: 8,462.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.48 : 28,187.40 = 5,640.56 : x
  2. Step 2: Convert to fraction form
    18,788.48/28,187.40 = 5,640.56/x
  3. Step 3: Cross multiply
    18,788.48x = 28,187.40 × 5,640.56
  4. Step 4: Simplify right side
    18,788.48x = 158,992,720.94
  5. Step 5: Solve for x
    x = 158,992,720.94/18,788.48
  6. Step 6: Final answer
    x = 8,462.25

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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.