Home / 2,986.31-4,121.57-1,808.07

Finding the Fourth Proportional to 2,986.31, 4,121.57 and 1,808.07

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Solution

The fourth proportional to 2,986.31, 4,121.57 and 1,808.07 is: 2,495.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.31 : 4,121.57 = 1,808.07 : x
  2. Step 2: Convert to fraction form
    2,986.31/4,121.57 = 1,808.07/x
  3. Step 3: Cross multiply
    2,986.31x = 4,121.57 × 1,808.07
  4. Step 4: Simplify right side
    2,986.31x = 7,452,065.96
  5. Step 5: Solve for x
    x = 7,452,065.96/2,986.31
  6. Step 6: Final answer
    x = 2,495.41

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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.