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Finding the Fourth Proportional to 8,456.84, 11,665.62 and 4,919.64

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Solution

The fourth proportional to 8,456.84, 11,665.62 and 4,919.64 is: 6,786.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,456.84 : 11,665.62 = 4,919.64 : x
  2. Step 2: Convert to fraction form
    8,456.84/11,665.62 = 4,919.64/x
  3. Step 3: Cross multiply
    8,456.84x = 11,665.62 × 4,919.64
  4. Step 4: Simplify right side
    8,456.84x = 57,390,650.78
  5. Step 5: Solve for x
    x = 57,390,650.78/8,456.84
  6. Step 6: Final answer
    x = 6,786.30

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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.