Home / 3,128.41-4,689.37-2,574.77

Finding the Fourth Proportional to 3,128.41, 4,689.37 and 2,574.77

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Solution

The fourth proportional to 3,128.41, 4,689.37 and 2,574.77 is: 3,859.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.41 : 4,689.37 = 2,574.77 : x
  2. Step 2: Convert to fraction form
    3,128.41/4,689.37 = 2,574.77/x
  3. Step 3: Cross multiply
    3,128.41x = 4,689.37 × 2,574.77
  4. Step 4: Simplify right side
    3,128.41x = 12,074,064.14
  5. Step 5: Solve for x
    x = 12,074,064.14/3,128.41
  6. Step 6: Final answer
    x = 3,859.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.