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Finding the Fourth Proportional to 18,704.31, 25,814.41 and 11,898.99

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Solution

The fourth proportional to 18,704.31, 25,814.41 and 11,898.99 is: 16,422.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.31 : 25,814.41 = 11,898.99 : x
  2. Step 2: Convert to fraction form
    18,704.31/25,814.41 = 11,898.99/x
  3. Step 3: Cross multiply
    18,704.31x = 25,814.41 × 11,898.99
  4. Step 4: Simplify right side
    18,704.31x = 307,165,406.45
  5. Step 5: Solve for x
    x = 307,165,406.45/18,704.31
  6. Step 6: Final answer
    x = 16,422.17

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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.