Home / 7,815.90-11,725.07-2,620.56

Finding the Fourth Proportional to 7,815.90, 11,725.07 and 2,620.56

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Solution

The fourth proportional to 7,815.90, 11,725.07 and 2,620.56 is: 3,931.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.90 : 11,725.07 = 2,620.56 : x
  2. Step 2: Convert to fraction form
    7,815.90/11,725.07 = 2,620.56/x
  3. Step 3: Cross multiply
    7,815.90x = 11,725.07 × 2,620.56
  4. Step 4: Simplify right side
    7,815.90x = 30,726,249.44
  5. Step 5: Solve for x
    x = 30,726,249.44/7,815.90
  6. Step 6: Final answer
    x = 3,931.25

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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.