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Finding the Fourth Proportional to 12,679.96, 18,987.06 and 8,743.36

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Solution

The fourth proportional to 12,679.96, 18,987.06 and 8,743.36 is: 13,092.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.96 : 18,987.06 = 8,743.36 : x
  2. Step 2: Convert to fraction form
    12,679.96/18,987.06 = 8,743.36/x
  3. Step 3: Cross multiply
    12,679.96x = 18,987.06 × 8,743.36
  4. Step 4: Simplify right side
    12,679.96x = 166,010,700.92
  5. Step 5: Solve for x
    x = 166,010,700.92/12,679.96
  6. Step 6: Final answer
    x = 13,092.37

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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.