Home / 21,038.75-31,558.37-5,455.43

Finding the Fourth Proportional to 21,038.75, 31,558.37 and 5,455.43

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Solution

The fourth proportional to 21,038.75, 31,558.37 and 5,455.43 is: 8,183.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.75 : 31,558.37 = 5,455.43 : x
  2. Step 2: Convert to fraction form
    21,038.75/31,558.37 = 5,455.43/x
  3. Step 3: Cross multiply
    21,038.75x = 31,558.37 × 5,455.43
  4. Step 4: Simplify right side
    21,038.75x = 172,164,451.17
  5. Step 5: Solve for x
    x = 172,164,451.17/21,038.75
  6. Step 6: Final answer
    x = 8,183.21

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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.