Home / 21,868.78-30,183.03-13,696.17

Finding the Fourth Proportional to 21,868.78, 30,183.03 and 13,696.17

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Solution

The fourth proportional to 21,868.78, 30,183.03 and 13,696.17 is: 18,903.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.78 : 30,183.03 = 13,696.17 : x
  2. Step 2: Convert to fraction form
    21,868.78/30,183.03 = 13,696.17/x
  3. Step 3: Cross multiply
    21,868.78x = 30,183.03 × 13,696.17
  4. Step 4: Simplify right side
    21,868.78x = 413,391,690.60
  5. Step 5: Solve for x
    x = 413,391,690.60/21,868.78
  6. Step 6: Final answer
    x = 18,903.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.