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Finding the Fourth Proportional to 12,861.20, 19,287 and 5,466.22

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Solution

The fourth proportional to 12,861.20, 19,287 and 5,466.22 is: 8,197.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,861.20 : 19,287 = 5,466.22 : x
  2. Step 2: Convert to fraction form
    12,861.20/19,287 = 5,466.22/x
  3. Step 3: Cross multiply
    12,861.20x = 19,287 × 5,466.22
  4. Step 4: Simplify right side
    12,861.20x = 105,426,985.14
  5. Step 5: Solve for x
    x = 105,426,985.14/12,861.20
  6. Step 6: Final answer
    x = 8,197.29

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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.