Home / 20,890.98-31,336.47-7,727.94

Finding the Fourth Proportional to 20,890.98, 31,336.47 and 7,727.94

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Solution

The fourth proportional to 20,890.98, 31,336.47 and 7,727.94 is: 11,591.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.98 : 31,336.47 = 7,727.94 : x
  2. Step 2: Convert to fraction form
    20,890.98/31,336.47 = 7,727.94/x
  3. Step 3: Cross multiply
    20,890.98x = 31,336.47 × 7,727.94
  4. Step 4: Simplify right side
    20,890.98x = 242,166,359.97
  5. Step 5: Solve for x
    x = 242,166,359.97/20,890.98
  6. Step 6: Final answer
    x = 11,591.91

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1.5x scale

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.