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Finding the Fourth Proportional to 18,465.69, 27,698.54 and 8,611.86

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Solution

The fourth proportional to 18,465.69, 27,698.54 and 8,611.86 is: 12,917.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,465.69 : 27,698.54 = 8,611.86 : x
  2. Step 2: Convert to fraction form
    18,465.69/27,698.54 = 8,611.86/x
  3. Step 3: Cross multiply
    18,465.69x = 27,698.54 × 8,611.86
  4. Step 4: Simplify right side
    18,465.69x = 238,535,905.63
  5. Step 5: Solve for x
    x = 238,535,905.63/18,465.69
  6. Step 6: Final answer
    x = 12,917.79

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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.