Home / 3,121.12-4,307.48-1,926.03

Finding the Fourth Proportional to 3,121.12, 4,307.48 and 1,926.03

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Solution

The fourth proportional to 3,121.12, 4,307.48 and 1,926.03 is: 2,658.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.12 : 4,307.48 = 1,926.03 : x
  2. Step 2: Convert to fraction form
    3,121.12/4,307.48 = 1,926.03/x
  3. Step 3: Cross multiply
    3,121.12x = 4,307.48 × 1,926.03
  4. Step 4: Simplify right side
    3,121.12x = 8,296,335.70
  5. Step 5: Solve for x
    x = 8,296,335.70/3,121.12
  6. Step 6: Final answer
    x = 2,658.13

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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.