Home / 18,255.99-27,379.80-5,109.69

Finding the Fourth Proportional to 18,255.99, 27,379.80 and 5,109.69

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Solution

The fourth proportional to 18,255.99, 27,379.80 and 5,109.69 is: 7,663.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,255.99 : 27,379.80 = 5,109.69 : x
  2. Step 2: Convert to fraction form
    18,255.99/27,379.80 = 5,109.69/x
  3. Step 3: Cross multiply
    18,255.99x = 27,379.80 × 5,109.69
  4. Step 4: Simplify right side
    18,255.99x = 139,902,290.26
  5. Step 5: Solve for x
    x = 139,902,290.26/18,255.99
  6. Step 6: Final answer
    x = 7,663.36

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1.5x scale

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.