Home / 21,321.09-31,995.47-9,634.41

Finding the Fourth Proportional to 21,321.09, 31,995.47 and 9,634.41

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Solution

The fourth proportional to 21,321.09, 31,995.47 and 9,634.41 is: 14,457.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.09 : 31,995.47 = 9,634.41 : x
  2. Step 2: Convert to fraction form
    21,321.09/31,995.47 = 9,634.41/x
  3. Step 3: Cross multiply
    21,321.09x = 31,995.47 × 9,634.41
  4. Step 4: Simplify right side
    21,321.09x = 308,257,500.21
  5. Step 5: Solve for x
    x = 308,257,500.21/21,321.09
  6. Step 6: Final answer
    x = 14,457.87

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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.