Home / 21,121.96-31,682.58-6,330.64

Finding the Fourth Proportional to 21,121.96, 31,682.58 and 6,330.64

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Solution

The fourth proportional to 21,121.96, 31,682.58 and 6,330.64 is: 9,495.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.96 : 31,682.58 = 6,330.64 : x
  2. Step 2: Convert to fraction form
    21,121.96/31,682.58 = 6,330.64/x
  3. Step 3: Cross multiply
    21,121.96x = 31,682.58 × 6,330.64
  4. Step 4: Simplify right side
    21,121.96x = 200,571,008.25
  5. Step 5: Solve for x
    x = 200,571,008.25/21,121.96
  6. Step 6: Final answer
    x = 9,495.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.