Home / 3,980.19-5,492.21-2,211.51

Finding the Fourth Proportional to 3,980.19, 5,492.21 and 2,211.51

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Solution

The fourth proportional to 3,980.19, 5,492.21 and 2,211.51 is: 3,051.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.19 : 5,492.21 = 2,211.51 : x
  2. Step 2: Convert to fraction form
    3,980.19/5,492.21 = 2,211.51/x
  3. Step 3: Cross multiply
    3,980.19x = 5,492.21 × 2,211.51
  4. Step 4: Simplify right side
    3,980.19x = 12,146,066.28
  5. Step 5: Solve for x
    x = 12,146,066.28/3,980.19
  6. Step 6: Final answer
    x = 3,051.63

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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.