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Finding the Fourth Proportional to 18,245.30, 25,178.79 and 10,689.82

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Solution

The fourth proportional to 18,245.30, 25,178.79 and 10,689.82 is: 14,752.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,245.30 : 25,178.79 = 10,689.82 : x
  2. Step 2: Convert to fraction form
    18,245.30/25,178.79 = 10,689.82/x
  3. Step 3: Cross multiply
    18,245.30x = 25,178.79 × 10,689.82
  4. Step 4: Simplify right side
    18,245.30x = 269,156,732.92
  5. Step 5: Solve for x
    x = 269,156,732.92/18,245.30
  6. Step 6: Final answer
    x = 14,752.12

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1.5x scale

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.