Home / 13,136.60-19,704.90-8,211.80

Finding the Fourth Proportional to 13,136.60, 19,704.90 and 8,211.80

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Solution

The fourth proportional to 13,136.60, 19,704.90 and 8,211.80 is: 12,317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.60 : 19,704.90 = 8,211.80 : x
  2. Step 2: Convert to fraction form
    13,136.60/19,704.90 = 8,211.80/x
  3. Step 3: Cross multiply
    13,136.60x = 19,704.90 × 8,211.80
  4. Step 4: Simplify right side
    13,136.60x = 161,812,697.82
  5. Step 5: Solve for x
    x = 161,812,697.82/13,136.60
  6. Step 6: Final answer
    x = 12,317.70

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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.