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Finding the Fourth Proportional to 8,790.39, 13,185.99 and 4,891.86

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Solution

The fourth proportional to 8,790.39, 13,185.99 and 4,891.86 is: 7,338.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,790.39 : 13,185.99 = 4,891.86 : x
  2. Step 2: Convert to fraction form
    8,790.39/13,185.99 = 4,891.86/x
  3. Step 3: Cross multiply
    8,790.39x = 13,185.99 × 4,891.86
  4. Step 4: Simplify right side
    8,790.39x = 64,504,017.04
  5. Step 5: Solve for x
    x = 64,504,017.04/8,790.39
  6. Step 6: Final answer
    x = 7,338.02

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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.