Home / 20,877.75-28,813.12-11,448.14

Finding the Fourth Proportional to 20,877.75, 28,813.12 and 11,448.14

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Solution

The fourth proportional to 20,877.75, 28,813.12 and 11,448.14 is: 15,799.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.75 : 28,813.12 = 11,448.14 : x
  2. Step 2: Convert to fraction form
    20,877.75/28,813.12 = 11,448.14/x
  3. Step 3: Cross multiply
    20,877.75x = 28,813.12 × 11,448.14
  4. Step 4: Simplify right side
    20,877.75x = 329,856,458.91
  5. Step 5: Solve for x
    x = 329,856,458.91/20,877.75
  6. Step 6: Final answer
    x = 15,799.43

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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.