Home / 20,370.68-28,110.99-11,418.75

Finding the Fourth Proportional to 20,370.68, 28,110.99 and 11,418.75

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Solution

The fourth proportional to 20,370.68, 28,110.99 and 11,418.75 is: 15,757.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.68 : 28,110.99 = 11,418.75 : x
  2. Step 2: Convert to fraction form
    20,370.68/28,110.99 = 11,418.75/x
  3. Step 3: Cross multiply
    20,370.68x = 28,110.99 × 11,418.75
  4. Step 4: Simplify right side
    20,370.68x = 320,992,367.06
  5. Step 5: Solve for x
    x = 320,992,367.06/20,370.68
  6. Step 6: Final answer
    x = 15,757.57

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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.