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Finding the Fourth Proportional to 8,969, 13,455.66 and 2,813

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Solution

The fourth proportional to 8,969, 13,455.66 and 2,813 is: 4,220.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,969 : 13,455.66 = 2,813 : x
  2. Step 2: Convert to fraction form
    8,969/13,455.66 = 2,813/x
  3. Step 3: Cross multiply
    8,969x = 13,455.66 × 2,813
  4. Step 4: Simplify right side
    8,969x = 37,850,771.58
  5. Step 5: Solve for x
    x = 37,850,771.58/8,969
  6. Step 6: Final answer
    x = 4,220.18

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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.