Home / 31,511.96-47,269.64-12,789.20

Finding the Fourth Proportional to 31,511.96, 47,269.64 and 12,789.20

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Solution

The fourth proportional to 31,511.96, 47,269.64 and 12,789.20 is: 19,184.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,511.96 : 47,269.64 = 12,789.20 : x
  2. Step 2: Convert to fraction form
    31,511.96/47,269.64 = 12,789.20/x
  3. Step 3: Cross multiply
    31,511.96x = 47,269.64 × 12,789.20
  4. Step 4: Simplify right side
    31,511.96x = 604,540,879.89
  5. Step 5: Solve for x
    x = 604,540,879.89/31,511.96
  6. Step 6: Final answer
    x = 19,184.49

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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.