Home / 2,986.23-4,128.96-2,939.46

Finding the Fourth Proportional to 2,986.23, 4,128.96 and 2,939.46

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Solution

The fourth proportional to 2,986.23, 4,128.96 and 2,939.46 is: 4,064.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.23 : 4,128.96 = 2,939.46 : x
  2. Step 2: Convert to fraction form
    2,986.23/4,128.96 = 2,939.46/x
  3. Step 3: Cross multiply
    2,986.23x = 4,128.96 × 2,939.46
  4. Step 4: Simplify right side
    2,986.23x = 12,136,912.76
  5. Step 5: Solve for x
    x = 12,136,912.76/2,986.23
  6. Step 6: Final answer
    x = 4,064.29

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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.