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Finding the Fourth Proportional to 38,472.21, 57,707.24 and 20,976.21

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Solution

The fourth proportional to 38,472.21, 57,707.24 and 20,976.21 is: 31,463.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,472.21 : 57,707.24 = 20,976.21 : x
  2. Step 2: Convert to fraction form
    38,472.21/57,707.24 = 20,976.21/x
  3. Step 3: Cross multiply
    38,472.21x = 57,707.24 × 20,976.21
  4. Step 4: Simplify right side
    38,472.21x = 1,210,479,079.88
  5. Step 5: Solve for x
    x = 1,210,479,079.88/38,472.21
  6. Step 6: Final answer
    x = 31,463.73

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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.