Home / 20,745.79-28,629.30-11,314.42

Finding the Fourth Proportional to 20,745.79, 28,629.30 and 11,314.42

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Solution

The fourth proportional to 20,745.79, 28,629.30 and 11,314.42 is: 15,613.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.79 : 28,629.30 = 11,314.42 : x
  2. Step 2: Convert to fraction form
    20,745.79/28,629.30 = 11,314.42/x
  3. Step 3: Cross multiply
    20,745.79x = 28,629.30 × 11,314.42
  4. Step 4: Simplify right side
    20,745.79x = 323,923,924.51
  5. Step 5: Solve for x
    x = 323,923,924.51/20,745.79
  6. Step 6: Final answer
    x = 15,613.96

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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.