Home / 13,138.20-19,711.89-8,202.06

Finding the Fourth Proportional to 13,138.20, 19,711.89 and 8,202.06

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Solution

The fourth proportional to 13,138.20, 19,711.89 and 8,202.06 is: 12,305.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.20 : 19,711.89 = 8,202.06 : x
  2. Step 2: Convert to fraction form
    13,138.20/19,711.89 = 8,202.06/x
  3. Step 3: Cross multiply
    13,138.20x = 19,711.89 × 8,202.06
  4. Step 4: Simplify right side
    13,138.20x = 161,678,104.49
  5. Step 5: Solve for x
    x = 161,678,104.49/13,138.20
  6. Step 6: Final answer
    x = 12,305.96

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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.