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Finding the Fourth Proportional to 9,136.60, 13,704.90 and 2,980.60

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Solution

The fourth proportional to 9,136.60, 13,704.90 and 2,980.60 is: 4,470.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,136.60 : 13,704.90 = 2,980.60 : x
  2. Step 2: Convert to fraction form
    9,136.60/13,704.90 = 2,980.60/x
  3. Step 3: Cross multiply
    9,136.60x = 13,704.90 × 2,980.60
  4. Step 4: Simplify right side
    9,136.60x = 40,848,824.94
  5. Step 5: Solve for x
    x = 40,848,824.94/9,136.60
  6. Step 6: Final answer
    x = 4,470.90

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1.5x scale

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.