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Finding the Fourth Proportional to 12,580.50, 17,361.09 and 6,991.50

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Solution

The fourth proportional to 12,580.50, 17,361.09 and 6,991.50 is: 9,648.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,580.50 : 17,361.09 = 6,991.50 : x
  2. Step 2: Convert to fraction form
    12,580.50/17,361.09 = 6,991.50/x
  3. Step 3: Cross multiply
    12,580.50x = 17,361.09 × 6,991.50
  4. Step 4: Simplify right side
    12,580.50x = 121,380,060.74
  5. Step 5: Solve for x
    x = 121,380,060.74/12,580.50
  6. Step 6: Final answer
    x = 9,648.27

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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.