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Finding the Fourth Proportional to 8,630.78, 11,903.02 and 6,739.43

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Solution

The fourth proportional to 8,630.78, 11,903.02 and 6,739.43 is: 9,294.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.78 : 11,903.02 = 6,739.43 : x
  2. Step 2: Convert to fraction form
    8,630.78/11,903.02 = 6,739.43/x
  3. Step 3: Cross multiply
    8,630.78x = 11,903.02 × 6,739.43
  4. Step 4: Simplify right side
    8,630.78x = 80,219,493.71
  5. Step 5: Solve for x
    x = 80,219,493.71/8,630.78
  6. Step 6: Final answer
    x = 9,294.59

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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.