Home / 20,731.82-28,612.17-11,781.50

Finding the Fourth Proportional to 20,731.82, 28,612.17 and 11,781.50

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Solution

The fourth proportional to 20,731.82, 28,612.17 and 11,781.50 is: 16,259.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.82 : 28,612.17 = 11,781.50 : x
  2. Step 2: Convert to fraction form
    20,731.82/28,612.17 = 11,781.50/x
  3. Step 3: Cross multiply
    20,731.82x = 28,612.17 × 11,781.50
  4. Step 4: Simplify right side
    20,731.82x = 337,094,137.79
  5. Step 5: Solve for x
    x = 337,094,137.79/20,731.82
  6. Step 6: Final answer
    x = 16,259.75

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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.