Home / 2,615.12-3,605.54-1,986.30

Finding the Fourth Proportional to 2,615.12, 3,605.54 and 1,986.30

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Solution

The fourth proportional to 2,615.12, 3,605.54 and 1,986.30 is: 2,738.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.12 : 3,605.54 = 1,986.30 : x
  2. Step 2: Convert to fraction form
    2,615.12/3,605.54 = 1,986.30/x
  3. Step 3: Cross multiply
    2,615.12x = 3,605.54 × 1,986.30
  4. Step 4: Simplify right side
    2,615.12x = 7,161,684.10
  5. Step 5: Solve for x
    x = 7,161,684.10/2,615.12
  6. Step 6: Final answer
    x = 2,738.57

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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.