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Finding the Fourth Proportional to 18,777.12, 25,909.38 and 10,392

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Solution

The fourth proportional to 18,777.12, 25,909.38 and 10,392 is: 14,339.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.12 : 25,909.38 = 10,392 : x
  2. Step 2: Convert to fraction form
    18,777.12/25,909.38 = 10,392/x
  3. Step 3: Cross multiply
    18,777.12x = 25,909.38 × 10,392
  4. Step 4: Simplify right side
    18,777.12x = 269,250,276.96
  5. Step 5: Solve for x
    x = 269,250,276.96/18,777.12
  6. Step 6: Final answer
    x = 14,339.27

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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.