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Finding the Fourth Proportional to 19,659, 29,493.36 and 6,512.70

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Solution

The fourth proportional to 19,659, 29,493.36 and 6,512.70 is: 9,770.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659 : 29,493.36 = 6,512.70 : x
  2. Step 2: Convert to fraction form
    19,659/29,493.36 = 6,512.70/x
  3. Step 3: Cross multiply
    19,659x = 29,493.36 × 6,512.70
  4. Step 4: Simplify right side
    19,659x = 192,081,405.67
  5. Step 5: Solve for x
    x = 192,081,405.67/19,659
  6. Step 6: Final answer
    x = 9,770.66

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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.