Home / 7,780.32-11,659.55-3,388.57

Finding the Fourth Proportional to 7,780.32, 11,659.55 and 3,388.57

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Solution

The fourth proportional to 7,780.32, 11,659.55 and 3,388.57 is: 5,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.32 : 11,659.55 = 3,388.57 : x
  2. Step 2: Convert to fraction form
    7,780.32/11,659.55 = 3,388.57/x
  3. Step 3: Cross multiply
    7,780.32x = 11,659.55 × 3,388.57
  4. Step 4: Simplify right side
    7,780.32x = 39,509,155.25
  5. Step 5: Solve for x
    x = 39,509,155.25/7,780.32
  6. Step 6: Final answer
    x = 5,078.09

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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.