Home / 2,136.61-3,188.37-1,890.57

Finding the Fourth Proportional to 2,136.61, 3,188.37 and 1,890.57

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Solution

The fourth proportional to 2,136.61, 3,188.37 and 1,890.57 is: 2,821.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.61 : 3,188.37 = 1,890.57 : x
  2. Step 2: Convert to fraction form
    2,136.61/3,188.37 = 1,890.57/x
  3. Step 3: Cross multiply
    2,136.61x = 3,188.37 × 1,890.57
  4. Step 4: Simplify right side
    2,136.61x = 6,027,836.67
  5. Step 5: Solve for x
    x = 6,027,836.67/2,136.61
  6. Step 6: Final answer
    x = 2,821.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.