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Finding the Fourth Proportional to 12,418.55, 18,627.81 and 8,737.24

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Solution

The fourth proportional to 12,418.55, 18,627.81 and 8,737.24 is: 13,105.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,418.55 : 18,627.81 = 8,737.24 : x
  2. Step 2: Convert to fraction form
    12,418.55/18,627.81 = 8,737.24/x
  3. Step 3: Cross multiply
    12,418.55x = 18,627.81 × 8,737.24
  4. Step 4: Simplify right side
    12,418.55x = 162,755,567.31
  5. Step 5: Solve for x
    x = 162,755,567.31/12,418.55
  6. Step 6: Final answer
    x = 13,105.84

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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.