Home / 20,117.23-27,757.72-12,159.89

Finding the Fourth Proportional to 20,117.23, 27,757.72 and 12,159.89

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Solution

The fourth proportional to 20,117.23, 27,757.72 and 12,159.89 is: 16,778.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.23 : 27,757.72 = 12,159.89 : x
  2. Step 2: Convert to fraction form
    20,117.23/27,757.72 = 12,159.89/x
  3. Step 3: Cross multiply
    20,117.23x = 27,757.72 × 12,159.89
  4. Step 4: Simplify right side
    20,117.23x = 337,530,652.66
  5. Step 5: Solve for x
    x = 337,530,652.66/20,117.23
  6. Step 6: Final answer
    x = 16,778.19

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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.