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Finding the Fourth Proportional to 25,992.60, 39,002.40 and 12,141.60

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Solution

The fourth proportional to 25,992.60, 39,002.40 and 12,141.60 is: 18,218.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,992.60 : 39,002.40 = 12,141.60 : x
  2. Step 2: Convert to fraction form
    25,992.60/39,002.40 = 12,141.60/x
  3. Step 3: Cross multiply
    25,992.60x = 39,002.40 × 12,141.60
  4. Step 4: Simplify right side
    25,992.60x = 473,551,539.84
  5. Step 5: Solve for x
    x = 473,551,539.84/25,992.60
  6. Step 6: Final answer
    x = 18,218.71

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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.