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Finding the Fourth Proportional to 19,671.29, 29,485.91 and 7,808.64

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Solution

The fourth proportional to 19,671.29, 29,485.91 and 7,808.64 is: 11,704.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,671.29 : 29,485.91 = 7,808.64 : x
  2. Step 2: Convert to fraction form
    19,671.29/29,485.91 = 7,808.64/x
  3. Step 3: Cross multiply
    19,671.29x = 29,485.91 × 7,808.64
  4. Step 4: Simplify right side
    19,671.29x = 230,244,817.22
  5. Step 5: Solve for x
    x = 230,244,817.22/19,671.29
  6. Step 6: Final answer
    x = 11,704.61

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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.