Home / 21,133.85-31,673.19-18,899.46

Finding the Fourth Proportional to 21,133.85, 31,673.19 and 18,899.46

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Solution

The fourth proportional to 21,133.85, 31,673.19 and 18,899.46 is: 28,324.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.85 : 31,673.19 = 18,899.46 : x
  2. Step 2: Convert to fraction form
    21,133.85/31,673.19 = 18,899.46/x
  3. Step 3: Cross multiply
    21,133.85x = 31,673.19 × 18,899.46
  4. Step 4: Simplify right side
    21,133.85x = 598,606,187.48
  5. Step 5: Solve for x
    x = 598,606,187.48/21,133.85
  6. Step 6: Final answer
    x = 28,324.53

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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.