Home / 20,984.27-31,443.59-11,120.90

Finding the Fourth Proportional to 20,984.27, 31,443.59 and 11,120.90

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Solution

The fourth proportional to 20,984.27, 31,443.59 and 11,120.90 is: 16,663.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.27 : 31,443.59 = 11,120.90 : x
  2. Step 2: Convert to fraction form
    20,984.27/31,443.59 = 11,120.90/x
  3. Step 3: Cross multiply
    20,984.27x = 31,443.59 × 11,120.90
  4. Step 4: Simplify right side
    20,984.27x = 349,680,890.62
  5. Step 5: Solve for x
    x = 349,680,890.62/20,984.27
  6. Step 6: Final answer
    x = 16,663.96

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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.