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Finding the Fourth Proportional to 12,395.90, 17,102.18 and 7,086.96

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Solution

The fourth proportional to 12,395.90, 17,102.18 and 7,086.96 is: 9,777.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,395.90 : 17,102.18 = 7,086.96 : x
  2. Step 2: Convert to fraction form
    12,395.90/17,102.18 = 7,086.96/x
  3. Step 3: Cross multiply
    12,395.90x = 17,102.18 × 7,086.96
  4. Step 4: Simplify right side
    12,395.90x = 121,202,465.57
  5. Step 5: Solve for x
    x = 121,202,465.57/12,395.90
  6. Step 6: Final answer
    x = 9,777.63

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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.