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Finding the Fourth Proportional to 8,486.51, 12,729.63 and 2,643.44

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Solution

The fourth proportional to 8,486.51, 12,729.63 and 2,643.44 is: 3,965.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.51 : 12,729.63 = 2,643.44 : x
  2. Step 2: Convert to fraction form
    8,486.51/12,729.63 = 2,643.44/x
  3. Step 3: Cross multiply
    8,486.51x = 12,729.63 × 2,643.44
  4. Step 4: Simplify right side
    8,486.51x = 33,650,013.13
  5. Step 5: Solve for x
    x = 33,650,013.13/8,486.51
  6. Step 6: Final answer
    x = 3,965.12

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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.