Home / 20,120.42-27,766.62-11,167.79

Finding the Fourth Proportional to 20,120.42, 27,766.62 and 11,167.79

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Solution

The fourth proportional to 20,120.42, 27,766.62 and 11,167.79 is: 15,411.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.42 : 27,766.62 = 11,167.79 : x
  2. Step 2: Convert to fraction form
    20,120.42/27,766.62 = 11,167.79/x
  3. Step 3: Cross multiply
    20,120.42x = 27,766.62 × 11,167.79
  4. Step 4: Simplify right side
    20,120.42x = 310,091,642.34
  5. Step 5: Solve for x
    x = 310,091,642.34/20,120.42
  6. Step 6: Final answer
    x = 15,411.79

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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.