Home / 21,258.49-29,324.50-13,286.88

Finding the Fourth Proportional to 21,258.49, 29,324.50 and 13,286.88

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Solution

The fourth proportional to 21,258.49, 29,324.50 and 13,286.88 is: 18,328.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,258.49 : 29,324.50 = 13,286.88 : x
  2. Step 2: Convert to fraction form
    21,258.49/29,324.50 = 13,286.88/x
  3. Step 3: Cross multiply
    21,258.49x = 29,324.50 × 13,286.88
  4. Step 4: Simplify right side
    21,258.49x = 389,631,112.56
  5. Step 5: Solve for x
    x = 389,631,112.56/21,258.49
  6. Step 6: Final answer
    x = 18,328.26

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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.