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Finding the Fourth Proportional to 9,888.70, 14,834.88 and 3,136

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Solution

The fourth proportional to 9,888.70, 14,834.88 and 3,136 is: 4,704.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,888.70 : 14,834.88 = 3,136 : x
  2. Step 2: Convert to fraction form
    9,888.70/14,834.88 = 3,136/x
  3. Step 3: Cross multiply
    9,888.70x = 14,834.88 × 3,136
  4. Step 4: Simplify right side
    9,888.70x = 46,522,183.68
  5. Step 5: Solve for x
    x = 46,522,183.68/9,888.70
  6. Step 6: Final answer
    x = 4,704.58

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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.