Home / 20,121.13-27,766.74-11,168.56

Finding the Fourth Proportional to 20,121.13, 27,766.74 and 11,168.56

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Solution

The fourth proportional to 20,121.13, 27,766.74 and 11,168.56 is: 15,412.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.13 : 27,766.74 = 11,168.56 : x
  2. Step 2: Convert to fraction form
    20,121.13/27,766.74 = 11,168.56/x
  3. Step 3: Cross multiply
    20,121.13x = 27,766.74 × 11,168.56
  4. Step 4: Simplify right side
    20,121.13x = 310,114,501.69
  5. Step 5: Solve for x
    x = 310,114,501.69/20,121.13
  6. Step 6: Final answer
    x = 15,412.38

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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.