Home / 13,679.82-18,881.75-8,912.85

Finding the Fourth Proportional to 13,679.82, 18,881.75 and 8,912.85

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Solution

The fourth proportional to 13,679.82, 18,881.75 and 8,912.85 is: 12,302.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.82 : 18,881.75 = 8,912.85 : x
  2. Step 2: Convert to fraction form
    13,679.82/18,881.75 = 8,912.85/x
  3. Step 3: Cross multiply
    13,679.82x = 18,881.75 × 8,912.85
  4. Step 4: Simplify right side
    13,679.82x = 168,290,160.92
  5. Step 5: Solve for x
    x = 168,290,160.92/13,679.82
  6. Step 6: Final answer
    x = 12,302.07

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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.