Home / 20,212.26-27,870.63-13,839.90

Finding the Fourth Proportional to 20,212.26, 27,870.63 and 13,839.90

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Solution

The fourth proportional to 20,212.26, 27,870.63 and 13,839.90 is: 19,083.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.26 : 27,870.63 = 13,839.90 : x
  2. Step 2: Convert to fraction form
    20,212.26/27,870.63 = 13,839.90/x
  3. Step 3: Cross multiply
    20,212.26x = 27,870.63 × 13,839.90
  4. Step 4: Simplify right side
    20,212.26x = 385,726,732.14
  5. Step 5: Solve for x
    x = 385,726,732.14/20,212.26
  6. Step 6: Final answer
    x = 19,083.80

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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.