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Finding the Fourth Proportional to 27,919.78, 41,879.61 and 7,143.22

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Solution

The fourth proportional to 27,919.78, 41,879.61 and 7,143.22 is: 10,714.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,919.78 : 41,879.61 = 7,143.22 : x
  2. Step 2: Convert to fraction form
    27,919.78/41,879.61 = 7,143.22/x
  3. Step 3: Cross multiply
    27,919.78x = 41,879.61 × 7,143.22
  4. Step 4: Simplify right side
    27,919.78x = 299,155,267.74
  5. Step 5: Solve for x
    x = 299,155,267.74/27,919.78
  6. Step 6: Final answer
    x = 10,714.81

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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.