Home / 20,379.24-28,135.62-13,317.48

Finding the Fourth Proportional to 20,379.24, 28,135.62 and 13,317.48

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Solution

The fourth proportional to 20,379.24, 28,135.62 and 13,317.48 is: 18,386.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.24 : 28,135.62 = 13,317.48 : x
  2. Step 2: Convert to fraction form
    20,379.24/28,135.62 = 13,317.48/x
  3. Step 3: Cross multiply
    20,379.24x = 28,135.62 × 13,317.48
  4. Step 4: Simplify right side
    20,379.24x = 374,695,556.64
  5. Step 5: Solve for x
    x = 374,695,556.64/20,379.24
  6. Step 6: Final answer
    x = 18,386.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.