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Finding the Fourth Proportional to 38,797.68, 58,222 and 21,279.80

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Solution

The fourth proportional to 38,797.68, 58,222 and 21,279.80 is: 31,933.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,797.68 : 58,222 = 21,279.80 : x
  2. Step 2: Convert to fraction form
    38,797.68/58,222 = 21,279.80/x
  3. Step 3: Cross multiply
    38,797.68x = 58,222 × 21,279.80
  4. Step 4: Simplify right side
    38,797.68x = 1,238,952,515.60
  5. Step 5: Solve for x
    x = 1,238,952,515.60/38,797.68
  6. Step 6: Final answer
    x = 31,933.68

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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.