Home / 3,120.21-4,306.14-1,861.65

Finding the Fourth Proportional to 3,120.21, 4,306.14 and 1,861.65

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Solution

The fourth proportional to 3,120.21, 4,306.14 and 1,861.65 is: 2,569.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.21 : 4,306.14 = 1,861.65 : x
  2. Step 2: Convert to fraction form
    3,120.21/4,306.14 = 1,861.65/x
  3. Step 3: Cross multiply
    3,120.21x = 4,306.14 × 1,861.65
  4. Step 4: Simplify right side
    3,120.21x = 8,016,525.53
  5. Step 5: Solve for x
    x = 8,016,525.53/3,120.21
  6. Step 6: Final answer
    x = 2,569.23

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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.