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Finding the Fourth Proportional to 17,090.90, 25,640.40 and 8,772.20

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Solution

The fourth proportional to 17,090.90, 25,640.40 and 8,772.20 is: 13,160.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,090.90 : 25,640.40 = 8,772.20 : x
  2. Step 2: Convert to fraction form
    17,090.90/25,640.40 = 8,772.20/x
  3. Step 3: Cross multiply
    17,090.90x = 25,640.40 × 8,772.20
  4. Step 4: Simplify right side
    17,090.90x = 224,922,716.88
  5. Step 5: Solve for x
    x = 224,922,716.88/17,090.90
  6. Step 6: Final answer
    x = 13,160.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.