Home / 2,986.29-4,121.53-2,149.76

Finding the Fourth Proportional to 2,986.29, 4,121.53 and 2,149.76

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Solution

The fourth proportional to 2,986.29, 4,121.53 and 2,149.76 is: 2,966.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.29 : 4,121.53 = 2,149.76 : x
  2. Step 2: Convert to fraction form
    2,986.29/4,121.53 = 2,149.76/x
  3. Step 3: Cross multiply
    2,986.29x = 4,121.53 × 2,149.76
  4. Step 4: Simplify right side
    2,986.29x = 8,860,300.33
  5. Step 5: Solve for x
    x = 8,860,300.33/2,986.29
  6. Step 6: Final answer
    x = 2,966.99

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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.