Home / 13,380.82-20,065.41-7,139.45

Finding the Fourth Proportional to 13,380.82, 20,065.41 and 7,139.45

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Solution

The fourth proportional to 13,380.82, 20,065.41 and 7,139.45 is: 10,706.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,380.82 : 20,065.41 = 7,139.45 : x
  2. Step 2: Convert to fraction form
    13,380.82/20,065.41 = 7,139.45/x
  3. Step 3: Cross multiply
    13,380.82x = 20,065.41 × 7,139.45
  4. Step 4: Simplify right side
    13,380.82x = 143,255,991.42
  5. Step 5: Solve for x
    x = 143,255,991.42/13,380.82
  6. Step 6: Final answer
    x = 10,706.07

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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.