Home / 20,107.80-27,748.52-11,155.08

Finding the Fourth Proportional to 20,107.80, 27,748.52 and 11,155.08

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Solution

The fourth proportional to 20,107.80, 27,748.52 and 11,155.08 is: 15,393.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.80 : 27,748.52 = 11,155.08 : x
  2. Step 2: Convert to fraction form
    20,107.80/27,748.52 = 11,155.08/x
  3. Step 3: Cross multiply
    20,107.80x = 27,748.52 × 11,155.08
  4. Step 4: Simplify right side
    20,107.80x = 309,536,960.48
  5. Step 5: Solve for x
    x = 309,536,960.48/20,107.80
  6. Step 6: Final answer
    x = 15,393.88

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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.