Home / 19,791.87-27,305.33-12,989.67

Finding the Fourth Proportional to 19,791.87, 27,305.33 and 12,989.67

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Solution

The fourth proportional to 19,791.87, 27,305.33 and 12,989.67 is: 17,920.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791.87 : 27,305.33 = 12,989.67 : x
  2. Step 2: Convert to fraction form
    19,791.87/27,305.33 = 12,989.67/x
  3. Step 3: Cross multiply
    19,791.87x = 27,305.33 × 12,989.67
  4. Step 4: Simplify right side
    19,791.87x = 354,687,160.99
  5. Step 5: Solve for x
    x = 354,687,160.99/19,791.87
  6. Step 6: Final answer
    x = 17,920.85

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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.