Home / 4,189.75-5,781.44-2,421.32

Finding the Fourth Proportional to 4,189.75, 5,781.44 and 2,421.32

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Solution

The fourth proportional to 4,189.75, 5,781.44 and 2,421.32 is: 3,341.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,189.75 : 5,781.44 = 2,421.32 : x
  2. Step 2: Convert to fraction form
    4,189.75/5,781.44 = 2,421.32/x
  3. Step 3: Cross multiply
    4,189.75x = 5,781.44 × 2,421.32
  4. Step 4: Simplify right side
    4,189.75x = 13,998,693.45
  5. Step 5: Solve for x
    x = 13,998,693.45/4,189.75
  6. Step 6: Final answer
    x = 3,341.18

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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.