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Finding the Fourth Proportional to 18,814.50, 28,213.20 and 8,965.68

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Solution

The fourth proportional to 18,814.50, 28,213.20 and 8,965.68 is: 13,444.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,814.50 : 28,213.20 = 8,965.68 : x
  2. Step 2: Convert to fraction form
    18,814.50/28,213.20 = 8,965.68/x
  3. Step 3: Cross multiply
    18,814.50x = 28,213.20 × 8,965.68
  4. Step 4: Simplify right side
    18,814.50x = 252,950,522.98
  5. Step 5: Solve for x
    x = 252,950,522.98/18,814.50
  6. Step 6: Final answer
    x = 13,444.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.