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Finding the Fourth Proportional to 12,238.60, 16,889.06 and 6,649.56

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Solution

The fourth proportional to 12,238.60, 16,889.06 and 6,649.56 is: 9,176.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,238.60 : 16,889.06 = 6,649.56 : x
  2. Step 2: Convert to fraction form
    12,238.60/16,889.06 = 6,649.56/x
  3. Step 3: Cross multiply
    12,238.60x = 16,889.06 × 6,649.56
  4. Step 4: Simplify right side
    12,238.60x = 112,304,817.81
  5. Step 5: Solve for x
    x = 112,304,817.81/12,238.60
  6. Step 6: Final answer
    x = 9,176.28

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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.