Home / 3,111.30-4,291.70-1,851.51

Finding the Fourth Proportional to 3,111.30, 4,291.70 and 1,851.51

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Solution

The fourth proportional to 3,111.30, 4,291.70 and 1,851.51 is: 2,553.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.30 : 4,291.70 = 1,851.51 : x
  2. Step 2: Convert to fraction form
    3,111.30/4,291.70 = 1,851.51/x
  3. Step 3: Cross multiply
    3,111.30x = 4,291.70 × 1,851.51
  4. Step 4: Simplify right side
    3,111.30x = 7,946,116.21
  5. Step 5: Solve for x
    x = 7,946,116.21/3,111.30
  6. Step 6: Final answer
    x = 2,553.95

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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.