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Finding the Fourth Proportional to 18,421.70, 27,632.30 and 11,028.20

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Solution

The fourth proportional to 18,421.70, 27,632.30 and 11,028.20 is: 16,542.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.70 : 27,632.30 = 11,028.20 : x
  2. Step 2: Convert to fraction form
    18,421.70/27,632.30 = 11,028.20/x
  3. Step 3: Cross multiply
    18,421.70x = 27,632.30 × 11,028.20
  4. Step 4: Simplify right side
    18,421.70x = 304,734,337.56
  5. Step 5: Solve for x
    x = 304,734,337.56/18,421.70
  6. Step 6: Final answer
    x = 16,542.14

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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.