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Finding the Fourth Proportional to 13,604.75, 18,774.90 and 7,636.88

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Solution

The fourth proportional to 13,604.75, 18,774.90 and 7,636.88 is: 10,539.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,604.75 : 18,774.90 = 7,636.88 : x
  2. Step 2: Convert to fraction form
    13,604.75/18,774.90 = 7,636.88/x
  3. Step 3: Cross multiply
    13,604.75x = 18,774.90 × 7,636.88
  4. Step 4: Simplify right side
    13,604.75x = 143,381,658.31
  5. Step 5: Solve for x
    x = 143,381,658.31/13,604.75
  6. Step 6: Final answer
    x = 10,539.09

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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.