Home / 3,121.56-4,307.84-1,862.72

Finding the Fourth Proportional to 3,121.56, 4,307.84 and 1,862.72

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Solution

The fourth proportional to 3,121.56, 4,307.84 and 1,862.72 is: 2,570.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.56 : 4,307.84 = 1,862.72 : x
  2. Step 2: Convert to fraction form
    3,121.56/4,307.84 = 1,862.72/x
  3. Step 3: Cross multiply
    3,121.56x = 4,307.84 × 1,862.72
  4. Step 4: Simplify right side
    3,121.56x = 8,024,268.87
  5. Step 5: Solve for x
    x = 8,024,268.87/3,121.56
  6. Step 6: Final answer
    x = 2,570.60

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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.