Home / 21,258.24-29,324.16-13,286.63

Finding the Fourth Proportional to 21,258.24, 29,324.16 and 13,286.63

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Solution

The fourth proportional to 21,258.24, 29,324.16 and 13,286.63 is: 18,327.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,258.24 : 29,324.16 = 13,286.63 : x
  2. Step 2: Convert to fraction form
    21,258.24/29,324.16 = 13,286.63/x
  3. Step 3: Cross multiply
    21,258.24x = 29,324.16 × 13,286.63
  4. Step 4: Simplify right side
    21,258.24x = 389,619,117.36
  5. Step 5: Solve for x
    x = 389,619,117.36/21,258.24
  6. Step 6: Final answer
    x = 18,327.91

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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.