Home / 7,975.85-11,960.12-2,780.51

Finding the Fourth Proportional to 7,975.85, 11,960.12 and 2,780.51

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Solution

The fourth proportional to 7,975.85, 11,960.12 and 2,780.51 is: 4,169.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,975.85 : 11,960.12 = 2,780.51 : x
  2. Step 2: Convert to fraction form
    7,975.85/11,960.12 = 2,780.51/x
  3. Step 3: Cross multiply
    7,975.85x = 11,960.12 × 2,780.51
  4. Step 4: Simplify right side
    7,975.85x = 33,255,180.41
  5. Step 5: Solve for x
    x = 33,255,180.41/7,975.85
  6. Step 6: Final answer
    x = 4,169.49

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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.