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Finding the Fourth Proportional to 19,450.71, 28,991.03 and 18,343.44

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Solution

The fourth proportional to 19,450.71, 28,991.03 and 18,343.44 is: 27,340.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,450.71 : 28,991.03 = 18,343.44 : x
  2. Step 2: Convert to fraction form
    19,450.71/28,991.03 = 18,343.44/x
  3. Step 3: Cross multiply
    19,450.71x = 28,991.03 × 18,343.44
  4. Step 4: Simplify right side
    19,450.71x = 531,795,127.63
  5. Step 5: Solve for x
    x = 531,795,127.63/19,450.71
  6. Step 6: Final answer
    x = 27,340.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.