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Finding the Fourth Proportional to 13,859.85, 20,789.13 and 5,094.12

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Solution

The fourth proportional to 13,859.85, 20,789.13 and 5,094.12 is: 7,640.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,859.85 : 20,789.13 = 5,094.12 : x
  2. Step 2: Convert to fraction form
    13,859.85/20,789.13 = 5,094.12/x
  3. Step 3: Cross multiply
    13,859.85x = 20,789.13 × 5,094.12
  4. Step 4: Simplify right side
    13,859.85x = 105,902,322.92
  5. Step 5: Solve for x
    x = 105,902,322.92/13,859.85
  6. Step 6: Final answer
    x = 7,640.94

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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.