Home / 8,421.42-11,621.64-4,644.73

Finding the Fourth Proportional to 8,421.42, 11,621.64 and 4,644.73

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Solution

The fourth proportional to 8,421.42, 11,621.64 and 4,644.73 is: 6,409.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.42 : 11,621.64 = 4,644.73 : x
  2. Step 2: Convert to fraction form
    8,421.42/11,621.64 = 4,644.73/x
  3. Step 3: Cross multiply
    8,421.42x = 11,621.64 × 4,644.73
  4. Step 4: Simplify right side
    8,421.42x = 53,979,379.96
  5. Step 5: Solve for x
    x = 53,979,379.96/8,421.42
  6. Step 6: Final answer
    x = 6,409.77

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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.