Home / 20,160.78-27,821.31-11,207.66

Finding the Fourth Proportional to 20,160.78, 27,821.31 and 11,207.66

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Solution

The fourth proportional to 20,160.78, 27,821.31 and 11,207.66 is: 15,466.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,160.78 : 27,821.31 = 11,207.66 : x
  2. Step 2: Convert to fraction form
    20,160.78/27,821.31 = 11,207.66/x
  3. Step 3: Cross multiply
    20,160.78x = 27,821.31 × 11,207.66
  4. Step 4: Simplify right side
    20,160.78x = 311,811,644.13
  5. Step 5: Solve for x
    x = 311,811,644.13/20,160.78
  6. Step 6: Final answer
    x = 15,466.25

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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.