Home / 20,780.97-28,676.91-11,706.12

Finding the Fourth Proportional to 20,780.97, 28,676.91 and 11,706.12

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Solution

The fourth proportional to 20,780.97, 28,676.91 and 11,706.12 is: 16,153.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.97 : 28,676.91 = 11,706.12 : x
  2. Step 2: Convert to fraction form
    20,780.97/28,676.91 = 11,706.12/x
  3. Step 3: Cross multiply
    20,780.97x = 28,676.91 × 11,706.12
  4. Step 4: Simplify right side
    20,780.97x = 335,695,349.69
  5. Step 5: Solve for x
    x = 335,695,349.69/20,780.97
  6. Step 6: Final answer
    x = 16,153.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.