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Finding the Fourth Proportional to 8,656.96, 12,988.53 and 2,813.59

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Solution

The fourth proportional to 8,656.96, 12,988.53 and 2,813.59 is: 4,221.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.96 : 12,988.53 = 2,813.59 : x
  2. Step 2: Convert to fraction form
    8,656.96/12,988.53 = 2,813.59/x
  3. Step 3: Cross multiply
    8,656.96x = 12,988.53 × 2,813.59
  4. Step 4: Simplify right side
    8,656.96x = 36,544,398.12
  5. Step 5: Solve for x
    x = 36,544,398.12/8,656.96
  6. Step 6: Final answer
    x = 4,221.39

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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.