Home / 13,727.87-18,945.96-7,680.31

Finding the Fourth Proportional to 13,727.87, 18,945.96 and 7,680.31

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Solution

The fourth proportional to 13,727.87, 18,945.96 and 7,680.31 is: 10,599.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,727.87 : 18,945.96 = 7,680.31 : x
  2. Step 2: Convert to fraction form
    13,727.87/18,945.96 = 7,680.31/x
  3. Step 3: Cross multiply
    13,727.87x = 18,945.96 × 7,680.31
  4. Step 4: Simplify right side
    13,727.87x = 145,510,846.05
  5. Step 5: Solve for x
    x = 145,510,846.05/13,727.87
  6. Step 6: Final answer
    x = 10,599.67

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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.