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Finding the Fourth Proportional to 12,782.99, 19,164.91 and 8,611.29

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Solution

The fourth proportional to 12,782.99, 19,164.91 and 8,611.29 is: 12,910.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,782.99 : 19,164.91 = 8,611.29 : x
  2. Step 2: Convert to fraction form
    12,782.99/19,164.91 = 8,611.29/x
  3. Step 3: Cross multiply
    12,782.99x = 19,164.91 × 8,611.29
  4. Step 4: Simplify right side
    12,782.99x = 165,034,597.83
  5. Step 5: Solve for x
    x = 165,034,597.83/12,782.99
  6. Step 6: Final answer
    x = 12,910.48

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Similar ratio
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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.