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Finding the Fourth Proportional to 8,676.78, 11,962.77 and 7,081.79

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Solution

The fourth proportional to 8,676.78, 11,962.77 and 7,081.79 is: 9,763.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,676.78 : 11,962.77 = 7,081.79 : x
  2. Step 2: Convert to fraction form
    8,676.78/11,962.77 = 7,081.79/x
  3. Step 3: Cross multiply
    8,676.78x = 11,962.77 × 7,081.79
  4. Step 4: Simplify right side
    8,676.78x = 84,717,845.71
  5. Step 5: Solve for x
    x = 84,717,845.71/8,676.78
  6. Step 6: Final answer
    x = 9,763.74

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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.