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Finding the Fourth Proportional to 13,305.60, 19,974.60 and 6,728.40

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Solution

The fourth proportional to 13,305.60, 19,974.60 and 6,728.40 is: 10,100.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,305.60 : 19,974.60 = 6,728.40 : x
  2. Step 2: Convert to fraction form
    13,305.60/19,974.60 = 6,728.40/x
  3. Step 3: Cross multiply
    13,305.60x = 19,974.60 × 6,728.40
  4. Step 4: Simplify right side
    13,305.60x = 134,397,098.64
  5. Step 5: Solve for x
    x = 134,397,098.64/13,305.60
  6. Step 6: Final answer
    x = 10,100.79

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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.