Home / 7,187.32-10,778.82-1,993.60

Finding the Fourth Proportional to 7,187.32, 10,778.82 and 1,993.60

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Solution

The fourth proportional to 7,187.32, 10,778.82 and 1,993.60 is: 2,989.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.32 : 10,778.82 = 1,993.60 : x
  2. Step 2: Convert to fraction form
    7,187.32/10,778.82 = 1,993.60/x
  3. Step 3: Cross multiply
    7,187.32x = 10,778.82 × 1,993.60
  4. Step 4: Simplify right side
    7,187.32x = 21,488,655.55
  5. Step 5: Solve for x
    x = 21,488,655.55/7,187.32
  6. Step 6: Final answer
    x = 2,989.80

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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.