Home / 8,421.21-11,620.83-4,644.31

Finding the Fourth Proportional to 8,421.21, 11,620.83 and 4,644.31

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Solution

The fourth proportional to 8,421.21, 11,620.83 and 4,644.31 is: 6,408.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.21 : 11,620.83 = 4,644.31 : x
  2. Step 2: Convert to fraction form
    8,421.21/11,620.83 = 4,644.31/x
  3. Step 3: Cross multiply
    8,421.21x = 11,620.83 × 4,644.31
  4. Step 4: Simplify right side
    8,421.21x = 53,970,723.45
  5. Step 5: Solve for x
    x = 53,970,723.45/8,421.21
  6. Step 6: Final answer
    x = 6,408.90

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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.