Home / 7,964.21-10,990.64-4,427.42

Finding the Fourth Proportional to 7,964.21, 10,990.64 and 4,427.42

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Solution

The fourth proportional to 7,964.21, 10,990.64 and 4,427.42 is: 6,109.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,964.21 : 10,990.64 = 4,427.42 : x
  2. Step 2: Convert to fraction form
    7,964.21/10,990.64 = 4,427.42/x
  3. Step 3: Cross multiply
    7,964.21x = 10,990.64 × 4,427.42
  4. Step 4: Simplify right side
    7,964.21x = 48,660,215.86
  5. Step 5: Solve for x
    x = 48,660,215.86/7,964.21
  6. Step 6: Final answer
    x = 6,109.86

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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.