Home / 20,228.10-28,008.09-19,839.30

Finding the Fourth Proportional to 20,228.10, 28,008.09 and 19,839.30

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Solution

The fourth proportional to 20,228.10, 28,008.09 and 19,839.30 is: 27,469.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,228.10 : 28,008.09 = 19,839.30 : x
  2. Step 2: Convert to fraction form
    20,228.10/28,008.09 = 19,839.30/x
  3. Step 3: Cross multiply
    20,228.10x = 28,008.09 × 19,839.30
  4. Step 4: Simplify right side
    20,228.10x = 555,660,899.94
  5. Step 5: Solve for x
    x = 555,660,899.94/20,228.10
  6. Step 6: Final answer
    x = 27,469.75

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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.