Home / 20,515.11-28,310.87-11,083.68

Finding the Fourth Proportional to 20,515.11, 28,310.87 and 11,083.68

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Solution

The fourth proportional to 20,515.11, 28,310.87 and 11,083.68 is: 15,295.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.11 : 28,310.87 = 11,083.68 : x
  2. Step 2: Convert to fraction form
    20,515.11/28,310.87 = 11,083.68/x
  3. Step 3: Cross multiply
    20,515.11x = 28,310.87 × 11,083.68
  4. Step 4: Simplify right side
    20,515.11x = 313,788,426.63
  5. Step 5: Solve for x
    x = 313,788,426.63/20,515.11
  6. Step 6: Final answer
    x = 15,295.48

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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.