Home / 20,419.97-28,178.51-11,467.85

Finding the Fourth Proportional to 20,419.97, 28,178.51 and 11,467.85

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Solution

The fourth proportional to 20,419.97, 28,178.51 and 11,467.85 is: 15,825.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.97 : 28,178.51 = 11,467.85 : x
  2. Step 2: Convert to fraction form
    20,419.97/28,178.51 = 11,467.85/x
  3. Step 3: Cross multiply
    20,419.97x = 28,178.51 × 11,467.85
  4. Step 4: Simplify right side
    20,419.97x = 323,146,727.67
  5. Step 5: Solve for x
    x = 323,146,727.67/20,419.97
  6. Step 6: Final answer
    x = 15,825.04

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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.