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Finding the Fourth Proportional to 14,428.77, 19,912.01 and 7,968.39

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Solution

The fourth proportional to 14,428.77, 19,912.01 and 7,968.39 is: 10,996.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,428.77 : 19,912.01 = 7,968.39 : x
  2. Step 2: Convert to fraction form
    14,428.77/19,912.01 = 7,968.39/x
  3. Step 3: Cross multiply
    14,428.77x = 19,912.01 × 7,968.39
  4. Step 4: Simplify right side
    14,428.77x = 158,666,653.29
  5. Step 5: Solve for x
    x = 158,666,653.29/14,428.77
  6. Step 6: Final answer
    x = 10,996.55

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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.