Home / 3,128.15-4,317.30-1,801.82

Finding the Fourth Proportional to 3,128.15, 4,317.30 and 1,801.82

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Solution

The fourth proportional to 3,128.15, 4,317.30 and 1,801.82 is: 2,486.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.15 : 4,317.30 = 1,801.82 : x
  2. Step 2: Convert to fraction form
    3,128.15/4,317.30 = 1,801.82/x
  3. Step 3: Cross multiply
    3,128.15x = 4,317.30 × 1,801.82
  4. Step 4: Simplify right side
    3,128.15x = 7,778,975.90
  5. Step 5: Solve for x
    x = 7,778,975.90/3,128.15
  6. Step 6: Final answer
    x = 2,486.77

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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.