Home / 20,730.62-31,121.94-16,621.82

Finding the Fourth Proportional to 20,730.62, 31,121.94 and 16,621.82

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Solution

The fourth proportional to 20,730.62, 31,121.94 and 16,621.82 is: 24,953.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.62 : 31,121.94 = 16,621.82 : x
  2. Step 2: Convert to fraction form
    20,730.62/31,121.94 = 16,621.82/x
  3. Step 3: Cross multiply
    20,730.62x = 31,121.94 × 16,621.82
  4. Step 4: Simplify right side
    20,730.62x = 517,303,284.73
  5. Step 5: Solve for x
    x = 517,303,284.73/20,730.62
  6. Step 6: Final answer
    x = 24,953.58

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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.