Home / 20,292.12-27,993.60-13,215.96

Finding the Fourth Proportional to 20,292.12, 27,993.60 and 13,215.96

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Solution

The fourth proportional to 20,292.12, 27,993.60 and 13,215.96 is: 18,231.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,292.12 : 27,993.60 = 13,215.96 : x
  2. Step 2: Convert to fraction form
    20,292.12/27,993.60 = 13,215.96/x
  3. Step 3: Cross multiply
    20,292.12x = 27,993.60 × 13,215.96
  4. Step 4: Simplify right side
    20,292.12x = 369,962,297.86
  5. Step 5: Solve for x
    x = 369,962,297.86/20,292.12
  6. Step 6: Final answer
    x = 18,231.82

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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.