Home / 21,418.81-29,568.68-13,465.42

Finding the Fourth Proportional to 21,418.81, 29,568.68 and 13,465.42

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Solution

The fourth proportional to 21,418.81, 29,568.68 and 13,465.42 is: 18,589.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.81 : 29,568.68 = 13,465.42 : x
  2. Step 2: Convert to fraction form
    21,418.81/29,568.68 = 13,465.42/x
  3. Step 3: Cross multiply
    21,418.81x = 29,568.68 × 13,465.42
  4. Step 4: Simplify right side
    21,418.81x = 398,154,604.29
  5. Step 5: Solve for x
    x = 398,154,604.29/21,418.81
  6. Step 6: Final answer
    x = 18,589.02

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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.