Home / 31,879.10-47,816.78-12,159.66

Finding the Fourth Proportional to 31,879.10, 47,816.78 and 12,159.66

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Solution

The fourth proportional to 31,879.10, 47,816.78 and 12,159.66 is: 18,238.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,879.10 : 47,816.78 = 12,159.66 : x
  2. Step 2: Convert to fraction form
    31,879.10/47,816.78 = 12,159.66/x
  3. Step 3: Cross multiply
    31,879.10x = 47,816.78 × 12,159.66
  4. Step 4: Simplify right side
    31,879.10x = 581,435,787.09
  5. Step 5: Solve for x
    x = 581,435,787.09/31,879.10
  6. Step 6: Final answer
    x = 18,238.78

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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.