Home / 31,455.18-47,109.86-18,947.88

Finding the Fourth Proportional to 31,455.18, 47,109.86 and 18,947.88

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Solution

The fourth proportional to 31,455.18, 47,109.86 and 18,947.88 is: 28,377.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,455.18 : 47,109.86 = 18,947.88 : x
  2. Step 2: Convert to fraction form
    31,455.18/47,109.86 = 18,947.88/x
  3. Step 3: Cross multiply
    31,455.18x = 47,109.86 × 18,947.88
  4. Step 4: Simplify right side
    31,455.18x = 892,631,879.36
  5. Step 5: Solve for x
    x = 892,631,879.36/31,455.18
  6. Step 6: Final answer
    x = 28,377.90

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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.