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Finding the Fourth Proportional to 39,596.40, 59,361.72 and 20,865.96

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Solution

The fourth proportional to 39,596.40, 59,361.72 and 20,865.96 is: 31,281.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,596.40 : 59,361.72 = 20,865.96 : x
  2. Step 2: Convert to fraction form
    39,596.40/59,361.72 = 20,865.96/x
  3. Step 3: Cross multiply
    39,596.40x = 59,361.72 × 20,865.96
  4. Step 4: Simplify right side
    39,596.40x = 1,238,639,275.05
  5. Step 5: Solve for x
    x = 1,238,639,275.05/39,596.40
  6. Step 6: Final answer
    x = 31,281.61

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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.