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Finding the Fourth Proportional to 19,619.54, 29,425.15 and 6,468.78

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Solution

The fourth proportional to 19,619.54, 29,425.15 and 6,468.78 is: 9,701.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,619.54 : 29,425.15 = 6,468.78 : x
  2. Step 2: Convert to fraction form
    19,619.54/29,425.15 = 6,468.78/x
  3. Step 3: Cross multiply
    19,619.54x = 29,425.15 × 6,468.78
  4. Step 4: Simplify right side
    19,619.54x = 190,344,829.90
  5. Step 5: Solve for x
    x = 190,344,829.90/19,619.54
  6. Step 6: Final answer
    x = 9,701.80

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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.