Home / 20,078.66-27,706.58-11,581.56

Finding the Fourth Proportional to 20,078.66, 27,706.58 and 11,581.56

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Solution

The fourth proportional to 20,078.66, 27,706.58 and 11,581.56 is: 15,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.66 : 27,706.58 = 11,581.56 : x
  2. Step 2: Convert to fraction form
    20,078.66/27,706.58 = 11,581.56/x
  3. Step 3: Cross multiply
    20,078.66x = 27,706.58 × 11,581.56
  4. Step 4: Simplify right side
    20,078.66x = 320,885,418.66
  5. Step 5: Solve for x
    x = 320,885,418.66/20,078.66
  6. Step 6: Final answer
    x = 15,981.42

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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.