Home / 20,120.74-27,766.20-11,167.71

Finding the Fourth Proportional to 20,120.74, 27,766.20 and 11,167.71

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Solution

The fourth proportional to 20,120.74, 27,766.20 and 11,167.71 is: 15,411.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.74 : 27,766.20 = 11,167.71 : x
  2. Step 2: Convert to fraction form
    20,120.74/27,766.20 = 11,167.71/x
  3. Step 3: Cross multiply
    20,120.74x = 27,766.20 × 11,167.71
  4. Step 4: Simplify right side
    20,120.74x = 310,084,869.40
  5. Step 5: Solve for x
    x = 310,084,869.40/20,120.74
  6. Step 6: Final answer
    x = 15,411.21

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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.