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Finding the Fourth Proportional to 12,859.59, 19,291.91 and 4,092.87

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Solution

The fourth proportional to 12,859.59, 19,291.91 and 4,092.87 is: 6,140.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,859.59 : 19,291.91 = 4,092.87 : x
  2. Step 2: Convert to fraction form
    12,859.59/19,291.91 = 4,092.87/x
  3. Step 3: Cross multiply
    12,859.59x = 19,291.91 × 4,092.87
  4. Step 4: Simplify right side
    12,859.59x = 78,959,259.22
  5. Step 5: Solve for x
    x = 78,959,259.22/12,859.59
  6. Step 6: Final answer
    x = 6,140.11

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