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Finding the Fourth Proportional to 13,666.69, 18,861.12 and 7,697.98

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Solution

The fourth proportional to 13,666.69, 18,861.12 and 7,697.98 is: 10,623.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,666.69 : 18,861.12 = 7,697.98 : x
  2. Step 2: Convert to fraction form
    13,666.69/18,861.12 = 7,697.98/x
  3. Step 3: Cross multiply
    13,666.69x = 18,861.12 × 7,697.98
  4. Step 4: Simplify right side
    13,666.69x = 145,192,524.54
  5. Step 5: Solve for x
    x = 145,192,524.54/13,666.69
  6. Step 6: Final answer
    x = 10,623.83

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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.