Home / 13,136.40-19,704.60-8,215.65

Finding the Fourth Proportional to 13,136.40, 19,704.60 and 8,215.65

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Solution

The fourth proportional to 13,136.40, 19,704.60 and 8,215.65 is: 12,323.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.40 : 19,704.60 = 8,215.65 : x
  2. Step 2: Convert to fraction form
    13,136.40/19,704.60 = 8,215.65/x
  3. Step 3: Cross multiply
    13,136.40x = 19,704.60 × 8,215.65
  4. Step 4: Simplify right side
    13,136.40x = 161,886,096.99
  5. Step 5: Solve for x
    x = 161,886,096.99/13,136.40
  6. Step 6: Final answer
    x = 12,323.48

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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.