Home / 21,389.95-29,517.38-11,958.49

Finding the Fourth Proportional to 21,389.95, 29,517.38 and 11,958.49

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Solution

The fourth proportional to 21,389.95, 29,517.38 and 11,958.49 is: 16,502.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.95 : 29,517.38 = 11,958.49 : x
  2. Step 2: Convert to fraction form
    21,389.95/29,517.38 = 11,958.49/x
  3. Step 3: Cross multiply
    21,389.95x = 29,517.38 × 11,958.49
  4. Step 4: Simplify right side
    21,389.95x = 352,983,145.97
  5. Step 5: Solve for x
    x = 352,983,145.97/21,389.95
  6. Step 6: Final answer
    x = 16,502.29

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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.