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Finding the Fourth Proportional to 14,936.64, 20,611.74 and 8,222.88

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Solution

The fourth proportional to 14,936.64, 20,611.74 and 8,222.88 is: 11,347.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,936.64 : 20,611.74 = 8,222.88 : x
  2. Step 2: Convert to fraction form
    14,936.64/20,611.74 = 8,222.88/x
  3. Step 3: Cross multiply
    14,936.64x = 20,611.74 × 8,222.88
  4. Step 4: Simplify right side
    14,936.64x = 169,487,864.61
  5. Step 5: Solve for x
    x = 169,487,864.61/14,936.64
  6. Step 6: Final answer
    x = 11,347.12

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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.