Home / 3,109.46-4,291.05-1,712.21

Finding the Fourth Proportional to 3,109.46, 4,291.05 and 1,712.21

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Solution

The fourth proportional to 3,109.46, 4,291.05 and 1,712.21 is: 2,362.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.46 : 4,291.05 = 1,712.21 : x
  2. Step 2: Convert to fraction form
    3,109.46/4,291.05 = 1,712.21/x
  3. Step 3: Cross multiply
    3,109.46x = 4,291.05 × 1,712.21
  4. Step 4: Simplify right side
    3,109.46x = 7,347,157.27
  5. Step 5: Solve for x
    x = 7,347,157.27/3,109.46
  6. Step 6: Final answer
    x = 2,362.84

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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.