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Finding the Fourth Proportional to 18,376, 25,359 and 9,992.80

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Solution

The fourth proportional to 18,376, 25,359 and 9,992.80 is: 13,790.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,376 : 25,359 = 9,992.80 : x
  2. Step 2: Convert to fraction form
    18,376/25,359 = 9,992.80/x
  3. Step 3: Cross multiply
    18,376x = 25,359 × 9,992.80
  4. Step 4: Simplify right side
    18,376x = 253,407,415.20
  5. Step 5: Solve for x
    x = 253,407,415.20/18,376
  6. Step 6: Final answer
    x = 13,790.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.