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Finding the Fourth Proportional to 12,200.81, 16,837.13 and 6,611.81

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Solution

The fourth proportional to 12,200.81, 16,837.13 and 6,611.81 is: 9,124.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,200.81 : 16,837.13 = 6,611.81 : x
  2. Step 2: Convert to fraction form
    12,200.81/16,837.13 = 6,611.81/x
  3. Step 3: Cross multiply
    12,200.81x = 16,837.13 × 6,611.81
  4. Step 4: Simplify right side
    12,200.81x = 111,323,904.51
  5. Step 5: Solve for x
    x = 111,323,904.51/12,200.81
  6. Step 6: Final answer
    x = 9,124.30

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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.