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Finding the Fourth Proportional to 13,279.87, 19,918.36 and 8,334.82

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Solution

The fourth proportional to 13,279.87, 19,918.36 and 8,334.82 is: 12,501.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.87 : 19,918.36 = 8,334.82 : x
  2. Step 2: Convert to fraction form
    13,279.87/19,918.36 = 8,334.82/x
  3. Step 3: Cross multiply
    13,279.87x = 19,918.36 × 8,334.82
  4. Step 4: Simplify right side
    13,279.87x = 166,015,945.30
  5. Step 5: Solve for x
    x = 166,015,945.30/13,279.87
  6. Step 6: Final answer
    x = 12,501.32

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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.