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Finding the Fourth Proportional to 13,914.98, 20,863.68 and 7,679.34

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Solution

The fourth proportional to 13,914.98, 20,863.68 and 7,679.34 is: 11,514.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,914.98 : 20,863.68 = 7,679.34 : x
  2. Step 2: Convert to fraction form
    13,914.98/20,863.68 = 7,679.34/x
  3. Step 3: Cross multiply
    13,914.98x = 20,863.68 × 7,679.34
  4. Step 4: Simplify right side
    13,914.98x = 160,219,292.37
  5. Step 5: Solve for x
    x = 160,219,292.37/13,914.98
  6. Step 6: Final answer
    x = 11,514.16

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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.