Home / 8,921.21-12,311.36-4,942.69

Finding the Fourth Proportional to 8,921.21, 12,311.36 and 4,942.69

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Solution

The fourth proportional to 8,921.21, 12,311.36 and 4,942.69 is: 6,820.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.21 : 12,311.36 = 4,942.69 : x
  2. Step 2: Convert to fraction form
    8,921.21/12,311.36 = 4,942.69/x
  3. Step 3: Cross multiply
    8,921.21x = 12,311.36 × 4,942.69
  4. Step 4: Simplify right side
    8,921.21x = 60,851,226.63
  5. Step 5: Solve for x
    x = 60,851,226.63/8,921.21
  6. Step 6: Final answer
    x = 6,820.96

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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.