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Finding the Fourth Proportional to 12,155.62, 18,213.99 and 10,989.22

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Solution

The fourth proportional to 12,155.62, 18,213.99 and 10,989.22 is: 16,466.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.62 : 18,213.99 = 10,989.22 : x
  2. Step 2: Convert to fraction form
    12,155.62/18,213.99 = 10,989.22/x
  3. Step 3: Cross multiply
    12,155.62x = 18,213.99 × 10,989.22
  4. Step 4: Simplify right side
    12,155.62x = 200,157,543.19
  5. Step 5: Solve for x
    x = 200,157,543.19/12,155.62
  6. Step 6: Final answer
    x = 16,466.26

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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.