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Finding the Fourth Proportional to 18,713.88, 25,834.90 and 13,672.44

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Solution

The fourth proportional to 18,713.88, 25,834.90 and 13,672.44 is: 18,875.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713.88 : 25,834.90 = 13,672.44 : x
  2. Step 2: Convert to fraction form
    18,713.88/25,834.90 = 13,672.44/x
  3. Step 3: Cross multiply
    18,713.88x = 25,834.90 × 13,672.44
  4. Step 4: Simplify right side
    18,713.88x = 353,226,120.16
  5. Step 5: Solve for x
    x = 353,226,120.16/18,713.88
  6. Step 6: Final answer
    x = 18,875.09

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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.