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Finding the Fourth Proportional to 13,279.29, 18,333 and 8,809.17

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Solution

The fourth proportional to 13,279.29, 18,333 and 8,809.17 is: 12,161.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.29 : 18,333 = 8,809.17 : x
  2. Step 2: Convert to fraction form
    13,279.29/18,333 = 8,809.17/x
  3. Step 3: Cross multiply
    13,279.29x = 18,333 × 8,809.17
  4. Step 4: Simplify right side
    13,279.29x = 161,498,513.61
  5. Step 5: Solve for x
    x = 161,498,513.61/13,279.29
  6. Step 6: Final answer
    x = 12,161.68

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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.