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Finding the Fourth Proportional to 8,726.80, 13,090.20 and 7,414.60

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Solution

The fourth proportional to 8,726.80, 13,090.20 and 7,414.60 is: 11,121.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,726.80 : 13,090.20 = 7,414.60 : x
  2. Step 2: Convert to fraction form
    8,726.80/13,090.20 = 7,414.60/x
  3. Step 3: Cross multiply
    8,726.80x = 13,090.20 × 7,414.60
  4. Step 4: Simplify right side
    8,726.80x = 97,058,596.92
  5. Step 5: Solve for x
    x = 97,058,596.92/8,726.80
  6. Step 6: Final answer
    x = 11,121.90

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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.