Home / 20,121.69-27,766.62-11,168.76

Finding the Fourth Proportional to 20,121.69, 27,766.62 and 11,168.76

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Solution

The fourth proportional to 20,121.69, 27,766.62 and 11,168.76 is: 15,412.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.69 : 27,766.62 = 11,168.76 : x
  2. Step 2: Convert to fraction form
    20,121.69/27,766.62 = 11,168.76/x
  3. Step 3: Cross multiply
    20,121.69x = 27,766.62 × 11,168.76
  4. Step 4: Simplify right side
    20,121.69x = 310,118,714.79
  5. Step 5: Solve for x
    x = 310,118,714.79/20,121.69
  6. Step 6: Final answer
    x = 15,412.16

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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.