Home / 20,515.04-28,310.74-11,083.60

Finding the Fourth Proportional to 20,515.04, 28,310.74 and 11,083.60

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Solution

The fourth proportional to 20,515.04, 28,310.74 and 11,083.60 is: 15,295.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.04 : 28,310.74 = 11,083.60 : x
  2. Step 2: Convert to fraction form
    20,515.04/28,310.74 = 11,083.60/x
  3. Step 3: Cross multiply
    20,515.04x = 28,310.74 × 11,083.60
  4. Step 4: Simplify right side
    20,515.04x = 313,784,917.86
  5. Step 5: Solve for x
    x = 313,784,917.86/20,515.04
  6. Step 6: Final answer
    x = 15,295.36

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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.