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Finding the Fourth Proportional to 12,383.40, 18,531.90 and 8,495.40

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Solution

The fourth proportional to 12,383.40, 18,531.90 and 8,495.40 is: 12,713.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,383.40 : 18,531.90 = 8,495.40 : x
  2. Step 2: Convert to fraction form
    12,383.40/18,531.90 = 8,495.40/x
  3. Step 3: Cross multiply
    12,383.40x = 18,531.90 × 8,495.40
  4. Step 4: Simplify right side
    12,383.40x = 157,435,903.26
  5. Step 5: Solve for x
    x = 157,435,903.26/12,383.40
  6. Step 6: Final answer
    x = 12,713.46

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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.