Home / 12,775.68-19,140.72-6,928.56

Finding the Fourth Proportional to 12,775.68, 19,140.72 and 6,928.56

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Solution

The fourth proportional to 12,775.68, 19,140.72 and 6,928.56 is: 10,380.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,775.68 : 19,140.72 = 6,928.56 : x
  2. Step 2: Convert to fraction form
    12,775.68/19,140.72 = 6,928.56/x
  3. Step 3: Cross multiply
    12,775.68x = 19,140.72 × 6,928.56
  4. Step 4: Simplify right side
    12,775.68x = 132,617,626.96
  5. Step 5: Solve for x
    x = 132,617,626.96/12,775.68
  6. Step 6: Final answer
    x = 10,380.48

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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.