Home / 20,820.14-28,732.53-11,866.19

Finding the Fourth Proportional to 20,820.14, 28,732.53 and 11,866.19

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Solution

The fourth proportional to 20,820.14, 28,732.53 and 11,866.19 is: 16,375.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.14 : 28,732.53 = 11,866.19 : x
  2. Step 2: Convert to fraction form
    20,820.14/28,732.53 = 11,866.19/x
  3. Step 3: Cross multiply
    20,820.14x = 28,732.53 × 11,866.19
  4. Step 4: Simplify right side
    20,820.14x = 340,945,731.99
  5. Step 5: Solve for x
    x = 340,945,731.99/20,820.14
  6. Step 6: Final answer
    x = 16,375.77

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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.