Home / 4,189.84-5,781.72-2,421.16

Finding the Fourth Proportional to 4,189.84, 5,781.72 and 2,421.16

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Solution

The fourth proportional to 4,189.84, 5,781.72 and 2,421.16 is: 3,341.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,189.84 : 5,781.72 = 2,421.16 : x
  2. Step 2: Convert to fraction form
    4,189.84/5,781.72 = 2,421.16/x
  3. Step 3: Cross multiply
    4,189.84x = 5,781.72 × 2,421.16
  4. Step 4: Simplify right side
    4,189.84x = 13,998,469.20
  5. Step 5: Solve for x
    x = 13,998,469.20/4,189.84
  6. Step 6: Final answer
    x = 3,341.05

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Double scale
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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.