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Finding the Fourth Proportional to 12,658.56, 18,987.84 and 3,424.56

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Solution

The fourth proportional to 12,658.56, 18,987.84 and 3,424.56 is: 5,136.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.56 : 18,987.84 = 3,424.56 : x
  2. Step 2: Convert to fraction form
    12,658.56/18,987.84 = 3,424.56/x
  3. Step 3: Cross multiply
    12,658.56x = 18,987.84 × 3,424.56
  4. Step 4: Simplify right side
    12,658.56x = 65,024,997.35
  5. Step 5: Solve for x
    x = 65,024,997.35/12,658.56
  6. Step 6: Final answer
    x = 5,136.84

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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.