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Finding the Fourth Proportional to 18,614.20, 27,913.20 and 6,129.40

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Solution

The fourth proportional to 18,614.20, 27,913.20 and 6,129.40 is: 9,191.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,614.20 : 27,913.20 = 6,129.40 : x
  2. Step 2: Convert to fraction form
    18,614.20/27,913.20 = 6,129.40/x
  3. Step 3: Cross multiply
    18,614.20x = 27,913.20 × 6,129.40
  4. Step 4: Simplify right side
    18,614.20x = 171,091,168.08
  5. Step 5: Solve for x
    x = 171,091,168.08/18,614.20
  6. Step 6: Final answer
    x = 9,191.43

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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.