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Finding the Fourth Proportional to 12,490.90, 17,241.06 and 8,245.06

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Solution

The fourth proportional to 12,490.90, 17,241.06 and 8,245.06 is: 11,380.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.90 : 17,241.06 = 8,245.06 : x
  2. Step 2: Convert to fraction form
    12,490.90/17,241.06 = 8,245.06/x
  3. Step 3: Cross multiply
    12,490.90x = 17,241.06 × 8,245.06
  4. Step 4: Simplify right side
    12,490.90x = 142,153,574.16
  5. Step 5: Solve for x
    x = 142,153,574.16/12,490.90
  6. Step 6: Final answer
    x = 11,380.57

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Half scale
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Double scale
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Similar ratio
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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.