Home / 3,790.13-5,230.31-2,111.51

Finding the Fourth Proportional to 3,790.13, 5,230.31 and 2,111.51

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Solution

The fourth proportional to 3,790.13, 5,230.31 and 2,111.51 is: 2,913.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,790.13 : 5,230.31 = 2,111.51 : x
  2. Step 2: Convert to fraction form
    3,790.13/5,230.31 = 2,111.51/x
  3. Step 3: Cross multiply
    3,790.13x = 5,230.31 × 2,111.51
  4. Step 4: Simplify right side
    3,790.13x = 11,043,851.87
  5. Step 5: Solve for x
    x = 11,043,851.87/3,790.13
  6. Step 6: Final answer
    x = 2,913.85

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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.