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Finding the Fourth Proportional to 38,122.51, 52,609.07 and 21,355.51

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Solution

The fourth proportional to 38,122.51, 52,609.07 and 21,355.51 is: 29,470.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,122.51 : 52,609.07 = 21,355.51 : x
  2. Step 2: Convert to fraction form
    38,122.51/52,609.07 = 21,355.51/x
  3. Step 3: Cross multiply
    38,122.51x = 52,609.07 × 21,355.51
  4. Step 4: Simplify right side
    38,122.51x = 1,123,493,520.48
  5. Step 5: Solve for x
    x = 1,123,493,520.48/38,122.51
  6. Step 6: Final answer
    x = 29,470.61

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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.