Home / 3,111.21-4,292.60-1,992.20

Finding the Fourth Proportional to 3,111.21, 4,292.60 and 1,992.20

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Solution

The fourth proportional to 3,111.21, 4,292.60 and 1,992.20 is: 2,748.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.21 : 4,292.60 = 1,992.20 : x
  2. Step 2: Convert to fraction form
    3,111.21/4,292.60 = 1,992.20/x
  3. Step 3: Cross multiply
    3,111.21x = 4,292.60 × 1,992.20
  4. Step 4: Simplify right side
    3,111.21x = 8,551,686.30
  5. Step 5: Solve for x
    x = 8,551,686.30/3,111.21
  6. Step 6: Final answer
    x = 2,748.67

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.