Home / 3,136.86-4,328.94-1,720.61

Finding the Fourth Proportional to 3,136.86, 4,328.94 and 1,720.61

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Solution

The fourth proportional to 3,136.86, 4,328.94 and 1,720.61 is: 2,374.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,136.86 : 4,328.94 = 1,720.61 : x
  2. Step 2: Convert to fraction form
    3,136.86/4,328.94 = 1,720.61/x
  3. Step 3: Cross multiply
    3,136.86x = 4,328.94 × 1,720.61
  4. Step 4: Simplify right side
    3,136.86x = 7,448,395.81
  5. Step 5: Solve for x
    x = 7,448,395.81/3,136.86
  6. Step 6: Final answer
    x = 2,374.48

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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.