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Finding the Fourth Proportional to 20,131.65, 30,188.09 and 7,472.59

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Solution

The fourth proportional to 20,131.65, 30,188.09 and 7,472.59 is: 11,205.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.65 : 30,188.09 = 7,472.59 : x
  2. Step 2: Convert to fraction form
    20,131.65/30,188.09 = 7,472.59/x
  3. Step 3: Cross multiply
    20,131.65x = 30,188.09 × 7,472.59
  4. Step 4: Simplify right side
    20,131.65x = 225,583,162.66
  5. Step 5: Solve for x
    x = 225,583,162.66/20,131.65
  6. Step 6: Final answer
    x = 11,205.40

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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.