Home / 20,731.26-28,609.90-11,780.28

Finding the Fourth Proportional to 20,731.26, 28,609.90 and 11,780.28

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Solution

The fourth proportional to 20,731.26, 28,609.90 and 11,780.28 is: 16,257.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.26 : 28,609.90 = 11,780.28 : x
  2. Step 2: Convert to fraction form
    20,731.26/28,609.90 = 11,780.28/x
  3. Step 3: Cross multiply
    20,731.26x = 28,609.90 × 11,780.28
  4. Step 4: Simplify right side
    20,731.26x = 337,032,632.77
  5. Step 5: Solve for x
    x = 337,032,632.77/20,731.26
  6. Step 6: Final answer
    x = 16,257.22

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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.