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Finding the Fourth Proportional to 13,301.88, 18,354.06 and 8,331

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Solution

The fourth proportional to 13,301.88, 18,354.06 and 8,331 is: 11,495.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,301.88 : 18,354.06 = 8,331 : x
  2. Step 2: Convert to fraction form
    13,301.88/18,354.06 = 8,331/x
  3. Step 3: Cross multiply
    13,301.88x = 18,354.06 × 8,331
  4. Step 4: Simplify right side
    13,301.88x = 152,907,673.86
  5. Step 5: Solve for x
    x = 152,907,673.86/13,301.88
  6. Step 6: Final answer
    x = 11,495.19

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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.