Home / 13,740.67-20,610.78-4,380.57

Finding the Fourth Proportional to 13,740.67, 20,610.78 and 4,380.57

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Solution

The fourth proportional to 13,740.67, 20,610.78 and 4,380.57 is: 6,570.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,740.67 : 20,610.78 = 4,380.57 : x
  2. Step 2: Convert to fraction form
    13,740.67/20,610.78 = 4,380.57/x
  3. Step 3: Cross multiply
    13,740.67x = 20,610.78 × 4,380.57
  4. Step 4: Simplify right side
    13,740.67x = 90,286,964.54
  5. Step 5: Solve for x
    x = 90,286,964.54/13,740.67
  6. Step 6: Final answer
    x = 6,570.78

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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.