Home / 20,109.66-27,748.54-13,399.62

Finding the Fourth Proportional to 20,109.66, 27,748.54 and 13,399.62

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Solution

The fourth proportional to 20,109.66, 27,748.54 and 13,399.62 is: 18,489.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.66 : 27,748.54 = 13,399.62 : x
  2. Step 2: Convert to fraction form
    20,109.66/27,748.54 = 13,399.62/x
  3. Step 3: Cross multiply
    20,109.66x = 27,748.54 × 13,399.62
  4. Step 4: Simplify right side
    20,109.66x = 371,819,891.55
  5. Step 5: Solve for x
    x = 371,819,891.55/20,109.66
  6. Step 6: Final answer
    x = 18,489.62

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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.