Home / 3,181.60-4,389.88-2,136.68

Finding the Fourth Proportional to 3,181.60, 4,389.88 and 2,136.68

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Solution

The fourth proportional to 3,181.60, 4,389.88 and 2,136.68 is: 2,948.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.60 : 4,389.88 = 2,136.68 : x
  2. Step 2: Convert to fraction form
    3,181.60/4,389.88 = 2,136.68/x
  3. Step 3: Cross multiply
    3,181.60x = 4,389.88 × 2,136.68
  4. Step 4: Simplify right side
    3,181.60x = 9,379,768.80
  5. Step 5: Solve for x
    x = 9,379,768.80/3,181.60
  6. Step 6: Final answer
    x = 2,948.13

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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.