Home / 20,513.75-28,308.99-11,082.31

Finding the Fourth Proportional to 20,513.75, 28,308.99 and 11,082.31

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Solution

The fourth proportional to 20,513.75, 28,308.99 and 11,082.31 is: 15,293.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.75 : 28,308.99 = 11,082.31 : x
  2. Step 2: Convert to fraction form
    20,513.75/28,308.99 = 11,082.31/x
  3. Step 3: Cross multiply
    20,513.75x = 28,308.99 × 11,082.31
  4. Step 4: Simplify right side
    20,513.75x = 313,729,002.97
  5. Step 5: Solve for x
    x = 313,729,002.97/20,513.75
  6. Step 6: Final answer
    x = 15,293.60

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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.