Home / 20,108.66-27,750.40-11,155.83

Finding the Fourth Proportional to 20,108.66, 27,750.40 and 11,155.83

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Solution

The fourth proportional to 20,108.66, 27,750.40 and 11,155.83 is: 15,395.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.66 : 27,750.40 = 11,155.83 : x
  2. Step 2: Convert to fraction form
    20,108.66/27,750.40 = 11,155.83/x
  3. Step 3: Cross multiply
    20,108.66x = 27,750.40 × 11,155.83
  4. Step 4: Simplify right side
    20,108.66x = 309,578,612.88
  5. Step 5: Solve for x
    x = 309,578,612.88/20,108.66
  6. Step 6: Final answer
    x = 15,395.29

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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.