Home / 20,767.42-28,654.66-13,211

Finding the Fourth Proportional to 20,767.42, 28,654.66 and 13,211

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Solution

The fourth proportional to 20,767.42, 28,654.66 and 13,211 is: 18,228.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,767.42 : 28,654.66 = 13,211 : x
  2. Step 2: Convert to fraction form
    20,767.42/28,654.66 = 13,211/x
  3. Step 3: Cross multiply
    20,767.42x = 28,654.66 × 13,211
  4. Step 4: Simplify right side
    20,767.42x = 378,556,713.26
  5. Step 5: Solve for x
    x = 378,556,713.26/20,767.42
  6. Step 6: Final answer
    x = 18,228.39

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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.