Home / 2,986.49-4,122.90-2,106.23

Finding the Fourth Proportional to 2,986.49, 4,122.90 and 2,106.23

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Solution

The fourth proportional to 2,986.49, 4,122.90 and 2,106.23 is: 2,907.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.49 : 4,122.90 = 2,106.23 : x
  2. Step 2: Convert to fraction form
    2,986.49/4,122.90 = 2,106.23/x
  3. Step 3: Cross multiply
    2,986.49x = 4,122.90 × 2,106.23
  4. Step 4: Simplify right side
    2,986.49x = 8,683,775.67
  5. Step 5: Solve for x
    x = 8,683,775.67/2,986.49
  6. Step 6: Final answer
    x = 2,907.69

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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.