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Finding the Fourth Proportional to 18,137.20, 27,173.64 and 15,477.72

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Solution

The fourth proportional to 18,137.20, 27,173.64 and 15,477.72 is: 23,189.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,137.20 : 27,173.64 = 15,477.72 : x
  2. Step 2: Convert to fraction form
    18,137.20/27,173.64 = 15,477.72/x
  3. Step 3: Cross multiply
    18,137.20x = 27,173.64 × 15,477.72
  4. Step 4: Simplify right side
    18,137.20x = 420,585,913.91
  5. Step 5: Solve for x
    x = 420,585,913.91/18,137.20
  6. Step 6: Final answer
    x = 23,189.13

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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.