Home / 20,107.12-27,748.92-13,039.60

Finding the Fourth Proportional to 20,107.12, 27,748.92 and 13,039.60

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Solution

The fourth proportional to 20,107.12, 27,748.92 and 13,039.60 is: 17,995.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.12 : 27,748.92 = 13,039.60 : x
  2. Step 2: Convert to fraction form
    20,107.12/27,748.92 = 13,039.60/x
  3. Step 3: Cross multiply
    20,107.12x = 27,748.92 × 13,039.60
  4. Step 4: Simplify right side
    20,107.12x = 361,834,817.23
  5. Step 5: Solve for x
    x = 361,834,817.23/20,107.12
  6. Step 6: Final answer
    x = 17,995.36

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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.