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Finding the Fourth Proportional to 39,682.60, 59,531.10 and 19,911.40

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Solution

The fourth proportional to 39,682.60, 59,531.10 and 19,911.40 is: 29,870.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,682.60 : 59,531.10 = 19,911.40 : x
  2. Step 2: Convert to fraction form
    39,682.60/59,531.10 = 19,911.40/x
  3. Step 3: Cross multiply
    39,682.60x = 59,531.10 × 19,911.40
  4. Step 4: Simplify right side
    39,682.60x = 1,185,347,544.54
  5. Step 5: Solve for x
    x = 1,185,347,544.54/39,682.60
  6. Step 6: Final answer
    x = 29,870.71

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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.