Home / 7,785.68-11,679.74-3,400.75

Finding the Fourth Proportional to 7,785.68, 11,679.74 and 3,400.75

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Solution

The fourth proportional to 7,785.68, 11,679.74 and 3,400.75 is: 5,101.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,785.68 : 11,679.74 = 3,400.75 : x
  2. Step 2: Convert to fraction form
    7,785.68/11,679.74 = 3,400.75/x
  3. Step 3: Cross multiply
    7,785.68x = 11,679.74 × 3,400.75
  4. Step 4: Simplify right side
    7,785.68x = 39,719,800.40
  5. Step 5: Solve for x
    x = 39,719,800.40/7,785.68
  6. Step 6: Final answer
    x = 5,101.65

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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.