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Finding the Fourth Proportional to 11,817.89, 16,308.50 and 6,512.89

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Solution

The fourth proportional to 11,817.89, 16,308.50 and 6,512.89 is: 8,987.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,817.89 : 16,308.50 = 6,512.89 : x
  2. Step 2: Convert to fraction form
    11,817.89/16,308.50 = 6,512.89/x
  3. Step 3: Cross multiply
    11,817.89x = 16,308.50 × 6,512.89
  4. Step 4: Simplify right side
    11,817.89x = 106,215,466.57
  5. Step 5: Solve for x
    x = 106,215,466.57/11,817.89
  6. Step 6: Final answer
    x = 8,987.68

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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.