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Finding the Fourth Proportional to 11,136, 16,706.56 and 3,840

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Solution

The fourth proportional to 11,136, 16,706.56 and 3,840 is: 5,760.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,136 : 16,706.56 = 3,840 : x
  2. Step 2: Convert to fraction form
    11,136/16,706.56 = 3,840/x
  3. Step 3: Cross multiply
    11,136x = 16,706.56 × 3,840
  4. Step 4: Simplify right side
    11,136x = 64,153,190.40
  5. Step 5: Solve for x
    x = 64,153,190.40/11,136
  6. Step 6: Final answer
    x = 5,760.88

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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.