Home / 20,131.34-27,778.28-11,178.92

Finding the Fourth Proportional to 20,131.34, 27,778.28 and 11,178.92

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Solution

The fourth proportional to 20,131.34, 27,778.28 and 11,178.92 is: 15,425.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.34 : 27,778.28 = 11,178.92 : x
  2. Step 2: Convert to fraction form
    20,131.34/27,778.28 = 11,178.92/x
  3. Step 3: Cross multiply
    20,131.34x = 27,778.28 × 11,178.92
  4. Step 4: Simplify right side
    20,131.34x = 310,531,169.86
  5. Step 5: Solve for x
    x = 310,531,169.86/20,131.34
  6. Step 6: Final answer
    x = 15,425.26

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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.