Home / 20,105.10-27,746.70-11,153.52

Finding the Fourth Proportional to 20,105.10, 27,746.70 and 11,153.52

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Solution

The fourth proportional to 20,105.10, 27,746.70 and 11,153.52 is: 15,392.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.10 : 27,746.70 = 11,153.52 : x
  2. Step 2: Convert to fraction form
    20,105.10/27,746.70 = 11,153.52/x
  3. Step 3: Cross multiply
    20,105.10x = 27,746.70 × 11,153.52
  4. Step 4: Simplify right side
    20,105.10x = 309,473,373.38
  5. Step 5: Solve for x
    x = 309,473,373.38/20,105.10
  6. Step 6: Final answer
    x = 15,392.78

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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.