Home / 8,421.17-11,620.32-4,644.09

Finding the Fourth Proportional to 8,421.17, 11,620.32 and 4,644.09

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Solution

The fourth proportional to 8,421.17, 11,620.32 and 4,644.09 is: 6,408.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.17 : 11,620.32 = 4,644.09 : x
  2. Step 2: Convert to fraction form
    8,421.17/11,620.32 = 4,644.09/x
  3. Step 3: Cross multiply
    8,421.17x = 11,620.32 × 4,644.09
  4. Step 4: Simplify right side
    8,421.17x = 53,965,753.81
  5. Step 5: Solve for x
    x = 53,965,753.81/8,421.17
  6. Step 6: Final answer
    x = 6,408.34

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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.