Home / 31,356.18-47,035.67-12,380.81

Finding the Fourth Proportional to 31,356.18, 47,035.67 and 12,380.81

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Solution

The fourth proportional to 31,356.18, 47,035.67 and 12,380.81 is: 18,571.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,356.18 : 47,035.67 = 12,380.81 : x
  2. Step 2: Convert to fraction form
    31,356.18/47,035.67 = 12,380.81/x
  3. Step 3: Cross multiply
    31,356.18x = 47,035.67 × 12,380.81
  4. Step 4: Simplify right side
    31,356.18x = 582,339,396.41
  5. Step 5: Solve for x
    x = 582,339,396.41/31,356.18
  6. Step 6: Final answer
    x = 18,571.76

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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.