Home / 18,579.78-27,868.59-13,587.21

Finding the Fourth Proportional to 18,579.78, 27,868.59 and 13,587.21

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Solution

The fourth proportional to 18,579.78, 27,868.59 and 13,587.21 is: 20,380.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,579.78 : 27,868.59 = 13,587.21 : x
  2. Step 2: Convert to fraction form
    18,579.78/27,868.59 = 13,587.21/x
  3. Step 3: Cross multiply
    18,579.78x = 27,868.59 × 13,587.21
  4. Step 4: Simplify right side
    18,579.78x = 378,656,384.73
  5. Step 5: Solve for x
    x = 378,656,384.73/18,579.78
  6. Step 6: Final answer
    x = 20,380.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.