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Finding the Fourth Proportional to 8,266.40, 12,388.80 and 4,369.76

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Solution

The fourth proportional to 8,266.40, 12,388.80 and 4,369.76 is: 6,548.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,266.40 : 12,388.80 = 4,369.76 : x
  2. Step 2: Convert to fraction form
    8,266.40/12,388.80 = 4,369.76/x
  3. Step 3: Cross multiply
    8,266.40x = 12,388.80 × 4,369.76
  4. Step 4: Simplify right side
    8,266.40x = 54,136,082.69
  5. Step 5: Solve for x
    x = 54,136,082.69/8,266.40
  6. Step 6: Final answer
    x = 6,548.93

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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.