Home / 20,662.96-28,513.68-11,231.44

Finding the Fourth Proportional to 20,662.96, 28,513.68 and 11,231.44

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Solution

The fourth proportional to 20,662.96, 28,513.68 and 11,231.44 is: 15,498.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.96 : 28,513.68 = 11,231.44 : x
  2. Step 2: Convert to fraction form
    20,662.96/28,513.68 = 11,231.44/x
  3. Step 3: Cross multiply
    20,662.96x = 28,513.68 × 11,231.44
  4. Step 4: Simplify right side
    20,662.96x = 320,249,686.10
  5. Step 5: Solve for x
    x = 320,249,686.10/20,662.96
  6. Step 6: Final answer
    x = 15,498.73

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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.