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Finding the Fourth Proportional to 12,810, 19,217.38 and 4,489.84

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Solution

The fourth proportional to 12,810, 19,217.38 and 4,489.84 is: 6,735.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,810 : 19,217.38 = 4,489.84 : x
  2. Step 2: Convert to fraction form
    12,810/19,217.38 = 4,489.84/x
  3. Step 3: Cross multiply
    12,810x = 19,217.38 × 4,489.84
  4. Step 4: Simplify right side
    12,810x = 86,282,961.42
  5. Step 5: Solve for x
    x = 86,282,961.42/12,810
  6. Step 6: Final answer
    x = 6,735.59

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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.