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Finding the Fourth Proportional to 21,754.70, 30,021.46 and 12,325.08

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Solution

The fourth proportional to 21,754.70, 30,021.46 and 12,325.08 is: 17,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,754.70 : 30,021.46 = 12,325.08 : x
  2. Step 2: Convert to fraction form
    21,754.70/30,021.46 = 12,325.08/x
  3. Step 3: Cross multiply
    21,754.70x = 30,021.46 × 12,325.08
  4. Step 4: Simplify right side
    21,754.70x = 370,016,896.22
  5. Step 5: Solve for x
    x = 370,016,896.22/21,754.70
  6. Step 6: Final answer
    x = 17,008.60

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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.