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Finding the Fourth Proportional to 12,659.49, 18,991.46 and 4,867.70

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Solution

The fourth proportional to 12,659.49, 18,991.46 and 4,867.70 is: 7,302.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.49 : 18,991.46 = 4,867.70 : x
  2. Step 2: Convert to fraction form
    12,659.49/18,991.46 = 4,867.70/x
  3. Step 3: Cross multiply
    12,659.49x = 18,991.46 × 4,867.70
  4. Step 4: Simplify right side
    12,659.49x = 92,444,647.05
  5. Step 5: Solve for x
    x = 92,444,647.05/12,659.49
  6. Step 6: Final answer
    x = 7,302.40

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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.