Home / 7,987.92-11,975.86-5,515.68

Finding the Fourth Proportional to 7,987.92, 11,975.86 and 5,515.68

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Solution

The fourth proportional to 7,987.92, 11,975.86 and 5,515.68 is: 8,269.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.92 : 11,975.86 = 5,515.68 : x
  2. Step 2: Convert to fraction form
    7,987.92/11,975.86 = 5,515.68/x
  3. Step 3: Cross multiply
    7,987.92x = 11,975.86 × 5,515.68
  4. Step 4: Simplify right side
    7,987.92x = 66,055,011.48
  5. Step 5: Solve for x
    x = 66,055,011.48/7,987.92
  6. Step 6: Final answer
    x = 8,269.36

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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.