Home / 13,136.10-19,704.15-8,220.90

Finding the Fourth Proportional to 13,136.10, 19,704.15 and 8,220.90

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Solution

The fourth proportional to 13,136.10, 19,704.15 and 8,220.90 is: 12,331.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.10 : 19,704.15 = 8,220.90 : x
  2. Step 2: Convert to fraction form
    13,136.10/19,704.15 = 8,220.90/x
  3. Step 3: Cross multiply
    13,136.10x = 19,704.15 × 8,220.90
  4. Step 4: Simplify right side
    13,136.10x = 161,985,846.74
  5. Step 5: Solve for x
    x = 161,985,846.74/13,136.10
  6. Step 6: Final answer
    x = 12,331.35

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Similar ratio
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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.