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Finding the Fourth Proportional to 8,061.78, 11,126.07 and 4,919.82

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Solution

The fourth proportional to 8,061.78, 11,126.07 and 4,919.82 is: 6,789.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,061.78 : 11,126.07 = 4,919.82 : x
  2. Step 2: Convert to fraction form
    8,061.78/11,126.07 = 4,919.82/x
  3. Step 3: Cross multiply
    8,061.78x = 11,126.07 × 4,919.82
  4. Step 4: Simplify right side
    8,061.78x = 54,738,261.71
  5. Step 5: Solve for x
    x = 54,738,261.71/8,061.78
  6. Step 6: Final answer
    x = 6,789.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.