Home / 13,813.38-20,679.93-12,388.59

Finding the Fourth Proportional to 13,813.38, 20,679.93 and 12,388.59

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Solution

The fourth proportional to 13,813.38, 20,679.93 and 12,388.59 is: 18,546.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,813.38 : 20,679.93 = 12,388.59 : x
  2. Step 2: Convert to fraction form
    13,813.38/20,679.93 = 12,388.59/x
  3. Step 3: Cross multiply
    13,813.38x = 20,679.93 × 12,388.59
  4. Step 4: Simplify right side
    13,813.38x = 256,195,174.00
  5. Step 5: Solve for x
    x = 256,195,174.00/13,813.38
  6. Step 6: Final answer
    x = 18,546.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.