Home / 20,273.36-27,990.41-18,145.21

Finding the Fourth Proportional to 20,273.36, 27,990.41 and 18,145.21

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Solution

The fourth proportional to 20,273.36, 27,990.41 and 18,145.21 is: 25,052.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,273.36 : 27,990.41 = 18,145.21 : x
  2. Step 2: Convert to fraction form
    20,273.36/27,990.41 = 18,145.21/x
  3. Step 3: Cross multiply
    20,273.36x = 27,990.41 × 18,145.21
  4. Step 4: Simplify right side
    20,273.36x = 507,891,706.73
  5. Step 5: Solve for x
    x = 507,891,706.73/20,273.36
  6. Step 6: Final answer
    x = 25,052.17

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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.