Home / 3,005.37-4,139.70-2,119.62

Finding the Fourth Proportional to 3,005.37, 4,139.70 and 2,119.62

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Solution

The fourth proportional to 3,005.37, 4,139.70 and 2,119.62 is: 2,919.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,005.37 : 4,139.70 = 2,119.62 : x
  2. Step 2: Convert to fraction form
    3,005.37/4,139.70 = 2,119.62/x
  3. Step 3: Cross multiply
    3,005.37x = 4,139.70 × 2,119.62
  4. Step 4: Simplify right side
    3,005.37x = 8,774,590.91
  5. Step 5: Solve for x
    x = 8,774,590.91/3,005.37
  6. Step 6: Final answer
    x = 2,919.64

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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.