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Finding the Fourth Proportional to 39,662.70, 59,429.73 and 20,941.74

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Solution

The fourth proportional to 39,662.70, 59,429.73 and 20,941.74 is: 31,378.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,662.70 : 59,429.73 = 20,941.74 : x
  2. Step 2: Convert to fraction form
    39,662.70/59,429.73 = 20,941.74/x
  3. Step 3: Cross multiply
    39,662.70x = 59,429.73 × 20,941.74
  4. Step 4: Simplify right side
    39,662.70x = 1,244,561,953.93
  5. Step 5: Solve for x
    x = 1,244,561,953.93/39,662.70
  6. Step 6: Final answer
    x = 31,378.65

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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.