Home / 20,833.64-28,751.12-11,402.21

Finding the Fourth Proportional to 20,833.64, 28,751.12 and 11,402.21

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Solution

The fourth proportional to 20,833.64, 28,751.12 and 11,402.21 is: 15,735.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,833.64 : 28,751.12 = 11,402.21 : x
  2. Step 2: Convert to fraction form
    20,833.64/28,751.12 = 11,402.21/x
  3. Step 3: Cross multiply
    20,833.64x = 28,751.12 × 11,402.21
  4. Step 4: Simplify right side
    20,833.64x = 327,826,107.21
  5. Step 5: Solve for x
    x = 327,826,107.21/20,833.64
  6. Step 6: Final answer
    x = 15,735.42

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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.