Home / 20,825.28-28,736.64-11,869.92

Finding the Fourth Proportional to 20,825.28, 28,736.64 and 11,869.92

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Solution

The fourth proportional to 20,825.28, 28,736.64 and 11,869.92 is: 16,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.28 : 28,736.64 = 11,869.92 : x
  2. Step 2: Convert to fraction form
    20,825.28/28,736.64 = 11,869.92/x
  3. Step 3: Cross multiply
    20,825.28x = 28,736.64 × 11,869.92
  4. Step 4: Simplify right side
    20,825.28x = 341,101,617.87
  5. Step 5: Solve for x
    x = 341,101,617.87/20,825.28
  6. Step 6: Final answer
    x = 16,379.21

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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.