Home / 4,122.12-6,178.86-1,929

Finding the Fourth Proportional to 4,122.12, 6,178.86 and 1,929

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Solution

The fourth proportional to 4,122.12, 6,178.86 and 1,929 is: 2,891.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,122.12 : 6,178.86 = 1,929 : x
  2. Step 2: Convert to fraction form
    4,122.12/6,178.86 = 1,929/x
  3. Step 3: Cross multiply
    4,122.12x = 6,178.86 × 1,929
  4. Step 4: Simplify right side
    4,122.12x = 11,919,020.94
  5. Step 5: Solve for x
    x = 11,919,020.94/4,122.12
  6. Step 6: Final answer
    x = 2,891.48

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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.