Home / 31,990.58-47,991.54-15,380.72

Finding the Fourth Proportional to 31,990.58, 47,991.54 and 15,380.72

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Solution

The fourth proportional to 31,990.58, 47,991.54 and 15,380.72 is: 23,073.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,990.58 : 47,991.54 = 15,380.72 : x
  2. Step 2: Convert to fraction form
    31,990.58/47,991.54 = 15,380.72/x
  3. Step 3: Cross multiply
    31,990.58x = 47,991.54 × 15,380.72
  4. Step 4: Simplify right side
    31,990.58x = 738,144,439.11
  5. Step 5: Solve for x
    x = 738,144,439.11/31,990.58
  6. Step 6: Final answer
    x = 23,073.81

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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.