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Finding the Fourth Proportional to 12,228.56, 18,344.56 and 3,905.84

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Solution

The fourth proportional to 12,228.56, 18,344.56 and 3,905.84 is: 5,859.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228.56 : 18,344.56 = 3,905.84 : x
  2. Step 2: Convert to fraction form
    12,228.56/18,344.56 = 3,905.84/x
  3. Step 3: Cross multiply
    12,228.56x = 18,344.56 × 3,905.84
  4. Step 4: Simplify right side
    12,228.56x = 71,650,916.23
  5. Step 5: Solve for x
    x = 71,650,916.23/12,228.56
  6. Step 6: Final answer
    x = 5,859.31

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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.