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Finding the Fourth Proportional to 12,685.08, 18,999.92 and 7,739.72

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Solution

The fourth proportional to 12,685.08, 18,999.92 and 7,739.72 is: 11,592.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.08 : 18,999.92 = 7,739.72 : x
  2. Step 2: Convert to fraction form
    12,685.08/18,999.92 = 7,739.72/x
  3. Step 3: Cross multiply
    12,685.08x = 18,999.92 × 7,739.72
  4. Step 4: Simplify right side
    12,685.08x = 147,054,060.82
  5. Step 5: Solve for x
    x = 147,054,060.82/12,685.08
  6. Step 6: Final answer
    x = 11,592.68

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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.