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Finding the Fourth Proportional to 15,033.20, 20,745.01 and 8,318.30

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Solution

The fourth proportional to 15,033.20, 20,745.01 and 8,318.30 is: 11,478.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,033.20 : 20,745.01 = 8,318.30 : x
  2. Step 2: Convert to fraction form
    15,033.20/20,745.01 = 8,318.30/x
  3. Step 3: Cross multiply
    15,033.20x = 20,745.01 × 8,318.30
  4. Step 4: Simplify right side
    15,033.20x = 172,563,123.36
  5. Step 5: Solve for x
    x = 172,563,123.36/15,033.20
  6. Step 6: Final answer
    x = 11,478.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.