Home / 21,690.72-29,933.28-13,724.64

Finding the Fourth Proportional to 21,690.72, 29,933.28 and 13,724.64

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Solution

The fourth proportional to 21,690.72, 29,933.28 and 13,724.64 is: 18,940.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,690.72 : 29,933.28 = 13,724.64 : x
  2. Step 2: Convert to fraction form
    21,690.72/29,933.28 = 13,724.64/x
  3. Step 3: Cross multiply
    21,690.72x = 29,933.28 × 13,724.64
  4. Step 4: Simplify right side
    21,690.72x = 410,823,492.02
  5. Step 5: Solve for x
    x = 410,823,492.02/21,690.72
  6. Step 6: Final answer
    x = 18,940.06

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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.