Home / 19,919.76-29,879.64-6,781.56

Finding the Fourth Proportional to 19,919.76, 29,879.64 and 6,781.56

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Solution

The fourth proportional to 19,919.76, 29,879.64 and 6,781.56 is: 10,172.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.76 : 29,879.64 = 6,781.56 : x
  2. Step 2: Convert to fraction form
    19,919.76/29,879.64 = 6,781.56/x
  3. Step 3: Cross multiply
    19,919.76x = 29,879.64 × 6,781.56
  4. Step 4: Simplify right side
    19,919.76x = 202,630,571.44
  5. Step 5: Solve for x
    x = 202,630,571.44/19,919.76
  6. Step 6: Final answer
    x = 10,172.34

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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.