Home / 20,156.40-27,805.21-11,975.33

Finding the Fourth Proportional to 20,156.40, 27,805.21 and 11,975.33

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Solution

The fourth proportional to 20,156.40, 27,805.21 and 11,975.33 is: 16,519.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.40 : 27,805.21 = 11,975.33 : x
  2. Step 2: Convert to fraction form
    20,156.40/27,805.21 = 11,975.33/x
  3. Step 3: Cross multiply
    20,156.40x = 27,805.21 × 11,975.33
  4. Step 4: Simplify right side
    20,156.40x = 332,976,605.04
  5. Step 5: Solve for x
    x = 332,976,605.04/20,156.40
  6. Step 6: Final answer
    x = 16,519.65

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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.