Home / 20,105.48-27,746.20-11,153.70

Finding the Fourth Proportional to 20,105.48, 27,746.20 and 11,153.70

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Solution

The fourth proportional to 20,105.48, 27,746.20 and 11,153.70 is: 15,392.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.48 : 27,746.20 = 11,153.70 : x
  2. Step 2: Convert to fraction form
    20,105.48/27,746.20 = 11,153.70/x
  3. Step 3: Cross multiply
    20,105.48x = 27,746.20 × 11,153.70
  4. Step 4: Simplify right side
    20,105.48x = 309,472,742.14
  5. Step 5: Solve for x
    x = 309,472,742.14/20,105.48
  6. Step 6: Final answer
    x = 15,392.46

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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.