Home / 6,439.21-8,883.79-3,920.47

Finding the Fourth Proportional to 6,439.21, 8,883.79 and 3,920.47

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Solution

The fourth proportional to 6,439.21, 8,883.79 and 3,920.47 is: 5,408.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.21 : 8,883.79 = 3,920.47 : x
  2. Step 2: Convert to fraction form
    6,439.21/8,883.79 = 3,920.47/x
  3. Step 3: Cross multiply
    6,439.21x = 8,883.79 × 3,920.47
  4. Step 4: Simplify right side
    6,439.21x = 34,828,632.18
  5. Step 5: Solve for x
    x = 34,828,632.18/6,439.21
  6. Step 6: Final answer
    x = 5,408.84

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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.