Home / 12,108.86-18,163.66-5,178.86

Finding the Fourth Proportional to 12,108.86, 18,163.66 and 5,178.86

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Solution

The fourth proportional to 12,108.86, 18,163.66 and 5,178.86 is: 7,768.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.86 : 18,163.66 = 5,178.86 : x
  2. Step 2: Convert to fraction form
    12,108.86/18,163.66 = 5,178.86/x
  3. Step 3: Cross multiply
    12,108.86x = 18,163.66 × 5,178.86
  4. Step 4: Simplify right side
    12,108.86x = 94,067,052.23
  5. Step 5: Solve for x
    x = 94,067,052.23/12,108.86
  6. Step 6: Final answer
    x = 7,768.45

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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.