Home / 20,310.15-28,027.82-11,357.55

Finding the Fourth Proportional to 20,310.15, 28,027.82 and 11,357.55

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Solution

The fourth proportional to 20,310.15, 28,027.82 and 11,357.55 is: 15,673.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.15 : 28,027.82 = 11,357.55 : x
  2. Step 2: Convert to fraction form
    20,310.15/28,027.82 = 11,357.55/x
  3. Step 3: Cross multiply
    20,310.15x = 28,027.82 × 11,357.55
  4. Step 4: Simplify right side
    20,310.15x = 318,327,310.25
  5. Step 5: Solve for x
    x = 318,327,310.25/20,310.15
  6. Step 6: Final answer
    x = 15,673.31

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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.