Home / 3,121.32-4,307.40-1,862.43

Finding the Fourth Proportional to 3,121.32, 4,307.40 and 1,862.43

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Solution

The fourth proportional to 3,121.32, 4,307.40 and 1,862.43 is: 2,570.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.32 : 4,307.40 = 1,862.43 : x
  2. Step 2: Convert to fraction form
    3,121.32/4,307.40 = 1,862.43/x
  3. Step 3: Cross multiply
    3,121.32x = 4,307.40 × 1,862.43
  4. Step 4: Simplify right side
    3,121.32x = 8,022,220.07
  5. Step 5: Solve for x
    x = 8,022,220.07/3,121.32
  6. Step 6: Final answer
    x = 2,570.14

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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.