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Finding the Fourth Proportional to 21,797.94, 30,084.45 and 13,305.00

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Solution

The fourth proportional to 21,797.94, 30,084.45 and 13,305.00 is: 18,362.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,797.94 : 30,084.45 = 13,305.00 : x
  2. Step 2: Convert to fraction form
    21,797.94/30,084.45 = 13,305.00/x
  3. Step 3: Cross multiply
    21,797.94x = 30,084.45 × 13,305.00
  4. Step 4: Simplify right side
    21,797.94x = 400,273,560.13
  5. Step 5: Solve for x
    x = 400,273,560.13/21,797.94
  6. Step 6: Final answer
    x = 18,362.90

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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.