Home / 20,305.12-28,021.17-11,812.27

Finding the Fourth Proportional to 20,305.12, 28,021.17 and 11,812.27

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Solution

The fourth proportional to 20,305.12, 28,021.17 and 11,812.27 is: 16,300.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,305.12 : 28,021.17 = 11,812.27 : x
  2. Step 2: Convert to fraction form
    20,305.12/28,021.17 = 11,812.27/x
  3. Step 3: Cross multiply
    20,305.12x = 28,021.17 × 11,812.27
  4. Step 4: Simplify right side
    20,305.12x = 330,993,625.76
  5. Step 5: Solve for x
    x = 330,993,625.76/20,305.12
  6. Step 6: Final answer
    x = 16,300.99

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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.