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Finding the Fourth Proportional to 18,776.17, 25,902.36 and 10,813.78

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Solution

The fourth proportional to 18,776.17, 25,902.36 and 10,813.78 is: 14,917.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.17 : 25,902.36 = 10,813.78 : x
  2. Step 2: Convert to fraction form
    18,776.17/25,902.36 = 10,813.78/x
  3. Step 3: Cross multiply
    18,776.17x = 25,902.36 × 10,813.78
  4. Step 4: Simplify right side
    18,776.17x = 280,102,357.76
  5. Step 5: Solve for x
    x = 280,102,357.76/18,776.17
  6. Step 6: Final answer
    x = 14,917.97

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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.