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Finding the Fourth Proportional to 12,668.50, 18,994.56 and 6,829.30

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Solution

The fourth proportional to 12,668.50, 18,994.56 and 6,829.30 is: 10,239.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,668.50 : 18,994.56 = 6,829.30 : x
  2. Step 2: Convert to fraction form
    12,668.50/18,994.56 = 6,829.30/x
  3. Step 3: Cross multiply
    12,668.50x = 18,994.56 × 6,829.30
  4. Step 4: Simplify right side
    12,668.50x = 129,719,548.61
  5. Step 5: Solve for x
    x = 129,719,548.61/12,668.50
  6. Step 6: Final answer
    x = 10,239.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.