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Finding the Fourth Proportional to 8,486.93, 12,730.68 and 2,643.59

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Solution

The fourth proportional to 8,486.93, 12,730.68 and 2,643.59 is: 3,965.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.93 : 12,730.68 = 2,643.59 : x
  2. Step 2: Convert to fraction form
    8,486.93/12,730.68 = 2,643.59/x
  3. Step 3: Cross multiply
    8,486.93x = 12,730.68 × 2,643.59
  4. Step 4: Simplify right side
    8,486.93x = 33,654,634.69
  5. Step 5: Solve for x
    x = 33,654,634.69/8,486.93
  6. Step 6: Final answer
    x = 3,965.47

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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.