Home / 8,122.91-11,211.48-5,136.44

Finding the Fourth Proportional to 8,122.91, 11,211.48 and 5,136.44

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Solution

The fourth proportional to 8,122.91, 11,211.48 and 5,136.44 is: 7,089.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,122.91 : 11,211.48 = 5,136.44 : x
  2. Step 2: Convert to fraction form
    8,122.91/11,211.48 = 5,136.44/x
  3. Step 3: Cross multiply
    8,122.91x = 11,211.48 × 5,136.44
  4. Step 4: Simplify right side
    8,122.91x = 57,587,038.27
  5. Step 5: Solve for x
    x = 57,587,038.27/8,122.91
  6. Step 6: Final answer
    x = 7,089.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.