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Finding the Fourth Proportional to 18,814.95, 28,200.96 and 8,940.24

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Solution

The fourth proportional to 18,814.95, 28,200.96 and 8,940.24 is: 13,400.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,814.95 : 28,200.96 = 8,940.24 : x
  2. Step 2: Convert to fraction form
    18,814.95/28,200.96 = 8,940.24/x
  3. Step 3: Cross multiply
    18,814.95x = 28,200.96 × 8,940.24
  4. Step 4: Simplify right side
    18,814.95x = 252,123,350.63
  5. Step 5: Solve for x
    x = 252,123,350.63/18,814.95
  6. Step 6: Final answer
    x = 13,400.16

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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.