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Finding the Fourth Proportional to 12,659.94, 18,991.43 and 5,269.40

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Solution

The fourth proportional to 12,659.94, 18,991.43 and 5,269.40 is: 7,904.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.94 : 18,991.43 = 5,269.40 : x
  2. Step 2: Convert to fraction form
    12,659.94/18,991.43 = 5,269.40/x
  3. Step 3: Cross multiply
    12,659.94x = 18,991.43 × 5,269.40
  4. Step 4: Simplify right side
    12,659.94x = 100,073,319.94
  5. Step 5: Solve for x
    x = 100,073,319.94/12,659.94
  6. Step 6: Final answer
    x = 7,904.72

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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.