Home / 3,121.03-4,308.75-2,127.77

Finding the Fourth Proportional to 3,121.03, 4,308.75 and 2,127.77

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Solution

The fourth proportional to 3,121.03, 4,308.75 and 2,127.77 is: 2,937.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.03 : 4,308.75 = 2,127.77 : x
  2. Step 2: Convert to fraction form
    3,121.03/4,308.75 = 2,127.77/x
  3. Step 3: Cross multiply
    3,121.03x = 4,308.75 × 2,127.77
  4. Step 4: Simplify right side
    3,121.03x = 9,168,028.99
  5. Step 5: Solve for x
    x = 9,168,028.99/3,121.03
  6. Step 6: Final answer
    x = 2,937.50

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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.