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Finding the Fourth Proportional to 18,619.26, 27,931.77 and 8,759.58

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Solution

The fourth proportional to 18,619.26, 27,931.77 and 8,759.58 is: 13,140.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.26 : 27,931.77 = 8,759.58 : x
  2. Step 2: Convert to fraction form
    18,619.26/27,931.77 = 8,759.58/x
  3. Step 3: Cross multiply
    18,619.26x = 27,931.77 × 8,759.58
  4. Step 4: Simplify right side
    18,619.26x = 244,670,573.86
  5. Step 5: Solve for x
    x = 244,670,573.86/18,619.26
  6. Step 6: Final answer
    x = 13,140.72

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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.