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Finding the Fourth Proportional to 8,613.78, 11,886.30 and 4,836.42

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Solution

The fourth proportional to 8,613.78, 11,886.30 and 4,836.42 is: 6,673.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.78 : 11,886.30 = 4,836.42 : x
  2. Step 2: Convert to fraction form
    8,613.78/11,886.30 = 4,836.42/x
  3. Step 3: Cross multiply
    8,613.78x = 11,886.30 × 4,836.42
  4. Step 4: Simplify right side
    8,613.78x = 57,487,139.05
  5. Step 5: Solve for x
    x = 57,487,139.05/8,613.78
  6. Step 6: Final answer
    x = 6,673.86

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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.