Home / 21,217.05-31,826.58-6,986.43

Finding the Fourth Proportional to 21,217.05, 31,826.58 and 6,986.43

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Solution

The fourth proportional to 21,217.05, 31,826.58 and 6,986.43 is: 10,479.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.05 : 31,826.58 = 6,986.43 : x
  2. Step 2: Convert to fraction form
    21,217.05/31,826.58 = 6,986.43/x
  3. Step 3: Cross multiply
    21,217.05x = 31,826.58 × 6,986.43
  4. Step 4: Simplify right side
    21,217.05x = 222,354,173.31
  5. Step 5: Solve for x
    x = 222,354,173.31/21,217.05
  6. Step 6: Final answer
    x = 10,479.98

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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.