Home / 21,153.29-31,668.17-18,333.54

Finding the Fourth Proportional to 21,153.29, 31,668.17 and 18,333.54

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Solution

The fourth proportional to 21,153.29, 31,668.17 and 18,333.54 is: 27,446.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.29 : 31,668.17 = 18,333.54 : x
  2. Step 2: Convert to fraction form
    21,153.29/31,668.17 = 18,333.54/x
  3. Step 3: Cross multiply
    21,153.29x = 31,668.17 × 18,333.54
  4. Step 4: Simplify right side
    21,153.29x = 580,589,569.75
  5. Step 5: Solve for x
    x = 580,589,569.75/21,153.29
  6. Step 6: Final answer
    x = 27,446.78

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1.5x scale

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.