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Finding the Fourth Proportional to 39,685, 54,765.30 and 22,021

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Solution

The fourth proportional to 39,685, 54,765.30 and 22,021 is: 30,388.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,685 : 54,765.30 = 22,021 : x
  2. Step 2: Convert to fraction form
    39,685/54,765.30 = 22,021/x
  3. Step 3: Cross multiply
    39,685x = 54,765.30 × 22,021
  4. Step 4: Simplify right side
    39,685x = 1,205,986,671.30
  5. Step 5: Solve for x
    x = 1,205,986,671.30/39,685
  6. Step 6: Final answer
    x = 30,388.98

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.