Home / 20,108.28-27,748.49-11,155.62

Finding the Fourth Proportional to 20,108.28, 27,748.49 and 11,155.62

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Solution

The fourth proportional to 20,108.28, 27,748.49 and 11,155.62 is: 15,394.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.28 : 27,748.49 = 11,155.62 : x
  2. Step 2: Convert to fraction form
    20,108.28/27,748.49 = 11,155.62/x
  3. Step 3: Cross multiply
    20,108.28x = 27,748.49 × 11,155.62
  4. Step 4: Simplify right side
    20,108.28x = 309,551,554.24
  5. Step 5: Solve for x
    x = 309,551,554.24/20,108.28
  6. Step 6: Final answer
    x = 15,394.23

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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.