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Finding the Fourth Proportional to 18,398.72, 27,602.20 and 6,711.92

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Solution

The fourth proportional to 18,398.72, 27,602.20 and 6,711.92 is: 10,069.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.72 : 27,602.20 = 6,711.92 : x
  2. Step 2: Convert to fraction form
    18,398.72/27,602.20 = 6,711.92/x
  3. Step 3: Cross multiply
    18,398.72x = 27,602.20 × 6,711.92
  4. Step 4: Simplify right side
    18,398.72x = 185,263,758.22
  5. Step 5: Solve for x
    x = 185,263,758.22/18,398.72
  6. Step 6: Final answer
    x = 10,069.38

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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.