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Finding the Fourth Proportional to 18,940.84, 28,424.22 and 9,713.32

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Solution

The fourth proportional to 18,940.84, 28,424.22 and 9,713.32 is: 14,576.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.84 : 28,424.22 = 9,713.32 : x
  2. Step 2: Convert to fraction form
    18,940.84/28,424.22 = 9,713.32/x
  3. Step 3: Cross multiply
    18,940.84x = 28,424.22 × 9,713.32
  4. Step 4: Simplify right side
    18,940.84x = 276,093,544.61
  5. Step 5: Solve for x
    x = 276,093,544.61/18,940.84
  6. Step 6: Final answer
    x = 14,576.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.