Home / 21,057.98-31,606.07-11,205.54

Finding the Fourth Proportional to 21,057.98, 31,606.07 and 11,205.54

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Solution

The fourth proportional to 21,057.98, 31,606.07 and 11,205.54 is: 16,818.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.98 : 31,606.07 = 11,205.54 : x
  2. Step 2: Convert to fraction form
    21,057.98/31,606.07 = 11,205.54/x
  3. Step 3: Cross multiply
    21,057.98x = 31,606.07 × 11,205.54
  4. Step 4: Simplify right side
    21,057.98x = 354,163,025.60
  5. Step 5: Solve for x
    x = 354,163,025.60/21,057.98
  6. Step 6: Final answer
    x = 16,818.47

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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.