Home / 20,105.85-27,746.13-11,154.18

Finding the Fourth Proportional to 20,105.85, 27,746.13 and 11,154.18

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Solution

The fourth proportional to 20,105.85, 27,746.13 and 11,154.18 is: 15,392.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.85 : 27,746.13 = 11,154.18 : x
  2. Step 2: Convert to fraction form
    20,105.85/27,746.13 = 11,154.18/x
  3. Step 3: Cross multiply
    20,105.85x = 27,746.13 × 11,154.18
  4. Step 4: Simplify right side
    20,105.85x = 309,485,328.32
  5. Step 5: Solve for x
    x = 309,485,328.32/20,105.85
  6. Step 6: Final answer
    x = 15,392.80

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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.