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Finding the Fourth Proportional to 13,846.63, 20,780.79 and 9,659.40

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Solution

The fourth proportional to 13,846.63, 20,780.79 and 9,659.40 is: 14,496.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,846.63 : 20,780.79 = 9,659.40 : x
  2. Step 2: Convert to fraction form
    13,846.63/20,780.79 = 9,659.40/x
  3. Step 3: Cross multiply
    13,846.63x = 20,780.79 × 9,659.40
  4. Step 4: Simplify right side
    13,846.63x = 200,729,810.73
  5. Step 5: Solve for x
    x = 200,729,810.73/13,846.63
  6. Step 6: Final answer
    x = 14,496.66

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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.