Home / 20,189.18-27,859.68-12,635.19

Finding the Fourth Proportional to 20,189.18, 27,859.68 and 12,635.19

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Solution

The fourth proportional to 20,189.18, 27,859.68 and 12,635.19 is: 17,435.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.18 : 27,859.68 = 12,635.19 : x
  2. Step 2: Convert to fraction form
    20,189.18/27,859.68 = 12,635.19/x
  3. Step 3: Cross multiply
    20,189.18x = 27,859.68 × 12,635.19
  4. Step 4: Simplify right side
    20,189.18x = 352,012,350.14
  5. Step 5: Solve for x
    x = 352,012,350.14/20,189.18
  6. Step 6: Final answer
    x = 17,435.69

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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.