Home / 3,980.18-5,492.40-2,211.72

Finding the Fourth Proportional to 3,980.18, 5,492.40 and 2,211.72

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Solution

The fourth proportional to 3,980.18, 5,492.40 and 2,211.72 is: 3,052.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.18 : 5,492.40 = 2,211.72 : x
  2. Step 2: Convert to fraction form
    3,980.18/5,492.40 = 2,211.72/x
  3. Step 3: Cross multiply
    3,980.18x = 5,492.40 × 2,211.72
  4. Step 4: Simplify right side
    3,980.18x = 12,147,670.19
  5. Step 5: Solve for x
    x = 12,147,670.19/3,980.18
  6. Step 6: Final answer
    x = 3,052.04

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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.