Home / 20,107.28-27,748.92-13,382.08

Finding the Fourth Proportional to 20,107.28, 27,748.92 and 13,382.08

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Solution

The fourth proportional to 20,107.28, 27,748.92 and 13,382.08 is: 18,467.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.28 : 27,748.92 = 13,382.08 : x
  2. Step 2: Convert to fraction form
    20,107.28/27,748.92 = 13,382.08/x
  3. Step 3: Cross multiply
    20,107.28x = 27,748.92 × 13,382.08
  4. Step 4: Simplify right side
    20,107.28x = 371,338,267.35
  5. Step 5: Solve for x
    x = 371,338,267.35/20,107.28
  6. Step 6: Final answer
    x = 18,467.85

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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.