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Finding the Fourth Proportional to 39,712.87, 59,462.58 and 20,953.88

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Solution

The fourth proportional to 39,712.87, 59,462.58 and 20,953.88 is: 31,374.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,712.87 : 59,462.58 = 20,953.88 : x
  2. Step 2: Convert to fraction form
    39,712.87/59,462.58 = 20,953.88/x
  3. Step 3: Cross multiply
    39,712.87x = 59,462.58 × 20,953.88
  4. Step 4: Simplify right side
    39,712.87x = 1,245,971,765.81
  5. Step 5: Solve for x
    x = 1,245,971,765.81/39,712.87
  6. Step 6: Final answer
    x = 31,374.51

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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.