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Finding the Fourth Proportional to 14,935.69, 20,611.09 and 8,221.17

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Solution

The fourth proportional to 14,935.69, 20,611.09 and 8,221.17 is: 11,345.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,935.69 : 20,611.09 = 8,221.17 : x
  2. Step 2: Convert to fraction form
    14,935.69/20,611.09 = 8,221.17/x
  3. Step 3: Cross multiply
    14,935.69x = 20,611.09 × 8,221.17
  4. Step 4: Simplify right side
    14,935.69x = 169,447,274.78
  5. Step 5: Solve for x
    x = 169,447,274.78/14,935.69
  6. Step 6: Final answer
    x = 11,345.13

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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.