Home / 20,370.30-28,110.48-11,418.38

Finding the Fourth Proportional to 20,370.30, 28,110.48 and 11,418.38

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Solution

The fourth proportional to 20,370.30, 28,110.48 and 11,418.38 is: 15,757.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.30 : 28,110.48 = 11,418.38 : x
  2. Step 2: Convert to fraction form
    20,370.30/28,110.48 = 11,418.38/x
  3. Step 3: Cross multiply
    20,370.30x = 28,110.48 × 11,418.38
  4. Step 4: Simplify right side
    20,370.30x = 320,976,064.67
  5. Step 5: Solve for x
    x = 320,976,064.67/20,370.30
  6. Step 6: Final answer
    x = 15,757.06

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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.