Home / 13,740.13-18,961.38-7,771.67

Finding the Fourth Proportional to 13,740.13, 18,961.38 and 7,771.67

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Solution

The fourth proportional to 13,740.13, 18,961.38 and 7,771.67 is: 10,724.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,740.13 : 18,961.38 = 7,771.67 : x
  2. Step 2: Convert to fraction form
    13,740.13/18,961.38 = 7,771.67/x
  3. Step 3: Cross multiply
    13,740.13x = 18,961.38 × 7,771.67
  4. Step 4: Simplify right side
    13,740.13x = 147,361,454.44
  5. Step 5: Solve for x
    x = 147,361,454.44/13,740.13
  6. Step 6: Final answer
    x = 10,724.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.