Home / 8,421.33-11,621.30-4,644.86

Finding the Fourth Proportional to 8,421.33, 11,621.30 and 4,644.86

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Solution

The fourth proportional to 8,421.33, 11,621.30 and 4,644.86 is: 6,409.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.33 : 11,621.30 = 4,644.86 : x
  2. Step 2: Convert to fraction form
    8,421.33/11,621.30 = 4,644.86/x
  3. Step 3: Cross multiply
    8,421.33x = 11,621.30 × 4,644.86
  4. Step 4: Simplify right side
    8,421.33x = 53,979,317.35
  5. Step 5: Solve for x
    x = 53,979,317.35/8,421.33
  6. Step 6: Final answer
    x = 6,409.83

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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.