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Finding the Fourth Proportional to 12,659.61, 18,991.23 and 3,895.26

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Solution

The fourth proportional to 12,659.61, 18,991.23 and 3,895.26 is: 5,843.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.61 : 18,991.23 = 3,895.26 : x
  2. Step 2: Convert to fraction form
    12,659.61/18,991.23 = 3,895.26/x
  3. Step 3: Cross multiply
    12,659.61x = 18,991.23 × 3,895.26
  4. Step 4: Simplify right side
    12,659.61x = 73,975,778.57
  5. Step 5: Solve for x
    x = 73,975,778.57/12,659.61
  6. Step 6: Final answer
    x = 5,843.45

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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.