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Finding the Fourth Proportional to 21,805.95, 30,093.81 and 12,246.40

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Solution

The fourth proportional to 21,805.95, 30,093.81 and 12,246.40 is: 16,900.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,805.95 : 30,093.81 = 12,246.40 : x
  2. Step 2: Convert to fraction form
    21,805.95/30,093.81 = 12,246.40/x
  3. Step 3: Cross multiply
    21,805.95x = 30,093.81 × 12,246.40
  4. Step 4: Simplify right side
    21,805.95x = 368,540,849.14
  5. Step 5: Solve for x
    x = 368,540,849.14/21,805.95
  6. Step 6: Final answer
    x = 16,900.93

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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.