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Finding the Fourth Proportional to 21,903, 30,226.19 and 12,471.57

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Solution

The fourth proportional to 21,903, 30,226.19 and 12,471.57 is: 17,210.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,903 : 30,226.19 = 12,471.57 : x
  2. Step 2: Convert to fraction form
    21,903/30,226.19 = 12,471.57/x
  3. Step 3: Cross multiply
    21,903x = 30,226.19 × 12,471.57
  4. Step 4: Simplify right side
    21,903x = 376,967,982.06
  5. Step 5: Solve for x
    x = 376,967,982.06/21,903
  6. Step 6: Final answer
    x = 17,210.79

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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.