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Finding the Fourth Proportional to 21,954.25, 30,243.40 and 16,643.89

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Solution

The fourth proportional to 21,954.25, 30,243.40 and 16,643.89 is: 22,928.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,954.25 : 30,243.40 = 16,643.89 : x
  2. Step 2: Convert to fraction form
    21,954.25/30,243.40 = 16,643.89/x
  3. Step 3: Cross multiply
    21,954.25x = 30,243.40 × 16,643.89
  4. Step 4: Simplify right side
    21,954.25x = 503,367,822.83
  5. Step 5: Solve for x
    x = 503,367,822.83/21,954.25
  6. Step 6: Final answer
    x = 22,928.04

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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.