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Finding the Fourth Proportional to 38,843.40, 58,221.90 and 21,325.80

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Solution

The fourth proportional to 38,843.40, 58,221.90 and 21,325.80 is: 31,964.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,843.40 : 58,221.90 = 21,325.80 : x
  2. Step 2: Convert to fraction form
    38,843.40/58,221.90 = 21,325.80/x
  3. Step 3: Cross multiply
    38,843.40x = 58,221.90 × 21,325.80
  4. Step 4: Simplify right side
    38,843.40x = 1,241,628,595.02
  5. Step 5: Solve for x
    x = 1,241,628,595.02/38,843.40
  6. Step 6: Final answer
    x = 31,964.98

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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.