Home / 13,781.75-20,667.15-10,665.27

Finding the Fourth Proportional to 13,781.75, 20,667.15 and 10,665.27

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Solution

The fourth proportional to 13,781.75, 20,667.15 and 10,665.27 is: 15,993.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.75 : 20,667.15 = 10,665.27 : x
  2. Step 2: Convert to fraction form
    13,781.75/20,667.15 = 10,665.27/x
  3. Step 3: Cross multiply
    13,781.75x = 20,667.15 × 10,665.27
  4. Step 4: Simplify right side
    13,781.75x = 220,420,734.88
  5. Step 5: Solve for x
    x = 220,420,734.88/13,781.75
  6. Step 6: Final answer
    x = 15,993.67

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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.