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Finding the Fourth Proportional to 18,814.23, 28,219.03 and 10,921.04

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Solution

The fourth proportional to 18,814.23, 28,219.03 and 10,921.04 is: 16,380.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,814.23 : 28,219.03 = 10,921.04 : x
  2. Step 2: Convert to fraction form
    18,814.23/28,219.03 = 10,921.04/x
  3. Step 3: Cross multiply
    18,814.23x = 28,219.03 × 10,921.04
  4. Step 4: Simplify right side
    18,814.23x = 308,181,155.39
  5. Step 5: Solve for x
    x = 308,181,155.39/18,814.23
  6. Step 6: Final answer
    x = 16,380.22

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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.