Home / 18,778.72-28,163.48-8,777.15

Finding the Fourth Proportional to 18,778.72, 28,163.48 and 8,777.15

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Solution

The fourth proportional to 18,778.72, 28,163.48 and 8,777.15 is: 13,163.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778.72 : 28,163.48 = 8,777.15 : x
  2. Step 2: Convert to fraction form
    18,778.72/28,163.48 = 8,777.15/x
  3. Step 3: Cross multiply
    18,778.72x = 28,163.48 × 8,777.15
  4. Step 4: Simplify right side
    18,778.72x = 247,195,088.48
  5. Step 5: Solve for x
    x = 247,195,088.48/18,778.72
  6. Step 6: Final answer
    x = 13,163.57

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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.