Home / 20,923.71-31,385.52-13,137.99

Finding the Fourth Proportional to 20,923.71, 31,385.52 and 13,137.99

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Solution

The fourth proportional to 20,923.71, 31,385.52 and 13,137.99 is: 19,706.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.71 : 31,385.52 = 13,137.99 : x
  2. Step 2: Convert to fraction form
    20,923.71/31,385.52 = 13,137.99/x
  3. Step 3: Cross multiply
    20,923.71x = 31,385.52 × 13,137.99
  4. Step 4: Simplify right side
    20,923.71x = 412,342,647.90
  5. Step 5: Solve for x
    x = 412,342,647.90/20,923.71
  6. Step 6: Final answer
    x = 19,706.96

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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.