Home / 20,120.28-27,766.06-11,167.48

Finding the Fourth Proportional to 20,120.28, 27,766.06 and 11,167.48

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Solution

The fourth proportional to 20,120.28, 27,766.06 and 11,167.48 is: 15,411.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.28 : 27,766.06 = 11,167.48 : x
  2. Step 2: Convert to fraction form
    20,120.28/27,766.06 = 11,167.48/x
  3. Step 3: Cross multiply
    20,120.28x = 27,766.06 × 11,167.48
  4. Step 4: Simplify right side
    20,120.28x = 310,076,919.73
  5. Step 5: Solve for x
    x = 310,076,919.73/20,120.28
  6. Step 6: Final answer
    x = 15,411.16

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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.