Home / 3,980.10-5,492.64-2,211.81

Finding the Fourth Proportional to 3,980.10, 5,492.64 and 2,211.81

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Solution

The fourth proportional to 3,980.10, 5,492.64 and 2,211.81 is: 3,052.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.10 : 5,492.64 = 2,211.81 : x
  2. Step 2: Convert to fraction form
    3,980.10/5,492.64 = 2,211.81/x
  3. Step 3: Cross multiply
    3,980.10x = 5,492.64 × 2,211.81
  4. Step 4: Simplify right side
    3,980.10x = 12,148,676.08
  5. Step 5: Solve for x
    x = 12,148,676.08/3,980.10
  6. Step 6: Final answer
    x = 3,052.35

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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.