Home / 20,945.88-28,893.78-13,275.12

Finding the Fourth Proportional to 20,945.88, 28,893.78 and 13,275.12

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Solution

The fourth proportional to 20,945.88, 28,893.78 and 13,275.12 is: 18,312.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.88 : 28,893.78 = 13,275.12 : x
  2. Step 2: Convert to fraction form
    20,945.88/28,893.78 = 13,275.12/x
  3. Step 3: Cross multiply
    20,945.88x = 28,893.78 × 13,275.12
  4. Step 4: Simplify right side
    20,945.88x = 383,568,396.75
  5. Step 5: Solve for x
    x = 383,568,396.75/20,945.88
  6. Step 6: Final answer
    x = 18,312.36

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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.