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Finding the Fourth Proportional to 14,704.68, 20,287.86 and 8,415.84

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Solution

The fourth proportional to 14,704.68, 20,287.86 and 8,415.84 is: 11,611.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,704.68 : 20,287.86 = 8,415.84 : x
  2. Step 2: Convert to fraction form
    14,704.68/20,287.86 = 8,415.84/x
  3. Step 3: Cross multiply
    14,704.68x = 20,287.86 × 8,415.84
  4. Step 4: Simplify right side
    14,704.68x = 170,739,383.70
  5. Step 5: Solve for x
    x = 170,739,383.70/14,704.68
  6. Step 6: Final answer
    x = 11,611.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.