Home / 2,986.13-4,122.09-2,147.18

Finding the Fourth Proportional to 2,986.13, 4,122.09 and 2,147.18

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Solution

The fourth proportional to 2,986.13, 4,122.09 and 2,147.18 is: 2,963.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.13 : 4,122.09 = 2,147.18 : x
  2. Step 2: Convert to fraction form
    2,986.13/4,122.09 = 2,147.18/x
  3. Step 3: Cross multiply
    2,986.13x = 4,122.09 × 2,147.18
  4. Step 4: Simplify right side
    2,986.13x = 8,850,848.60
  5. Step 5: Solve for x
    x = 8,850,848.60/2,986.13
  6. Step 6: Final answer
    x = 2,963.98

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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.