Home / 20,105.70-27,746.00-11,153.39

Finding the Fourth Proportional to 20,105.70, 27,746.00 and 11,153.39

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Solution

The fourth proportional to 20,105.70, 27,746.00 and 11,153.39 is: 15,391.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.70 : 27,746.00 = 11,153.39 : x
  2. Step 2: Convert to fraction form
    20,105.70/27,746.00 = 11,153.39/x
  3. Step 3: Cross multiply
    20,105.70x = 27,746.00 × 11,153.39
  4. Step 4: Simplify right side
    20,105.70x = 309,461,764.44
  5. Step 5: Solve for x
    x = 309,461,764.44/20,105.70
  6. Step 6: Final answer
    x = 15,391.74

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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.