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Finding the Fourth Proportional to 13,657.97, 20,438.19 and 9,914.09

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Solution

The fourth proportional to 13,657.97, 20,438.19 and 9,914.09 is: 14,835.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,657.97 : 20,438.19 = 9,914.09 : x
  2. Step 2: Convert to fraction form
    13,657.97/20,438.19 = 9,914.09/x
  3. Step 3: Cross multiply
    13,657.97x = 20,438.19 × 9,914.09
  4. Step 4: Simplify right side
    13,657.97x = 202,625,952.91
  5. Step 5: Solve for x
    x = 202,625,952.91/13,657.97
  6. Step 6: Final answer
    x = 14,835.73

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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.