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Finding the Fourth Proportional to 18,997.23, 28,491.49 and 7,152.23

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Solution

The fourth proportional to 18,997.23, 28,491.49 and 7,152.23 is: 10,726.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,997.23 : 28,491.49 = 7,152.23 : x
  2. Step 2: Convert to fraction form
    18,997.23/28,491.49 = 7,152.23/x
  3. Step 3: Cross multiply
    18,997.23x = 28,491.49 × 7,152.23
  4. Step 4: Simplify right side
    18,997.23x = 203,777,783.40
  5. Step 5: Solve for x
    x = 203,777,783.40/18,997.23
  6. Step 6: Final answer
    x = 10,726.71

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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.