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Finding the Fourth Proportional to 25,420, 38,141.52 and 12,269.92

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Solution

The fourth proportional to 25,420, 38,141.52 and 12,269.92 is: 18,410.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,420 : 38,141.52 = 12,269.92 : x
  2. Step 2: Convert to fraction form
    25,420/38,141.52 = 12,269.92/x
  3. Step 3: Cross multiply
    25,420x = 38,141.52 × 12,269.92
  4. Step 4: Simplify right side
    25,420x = 467,993,399.08
  5. Step 5: Solve for x
    x = 467,993,399.08/25,420
  6. Step 6: Final answer
    x = 18,410.44

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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.