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Finding the Fourth Proportional to 13,757.29, 18,986.24 and 7,790.01

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Solution

The fourth proportional to 13,757.29, 18,986.24 and 7,790.01 is: 10,750.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.29 : 18,986.24 = 7,790.01 : x
  2. Step 2: Convert to fraction form
    13,757.29/18,986.24 = 7,790.01/x
  3. Step 3: Cross multiply
    13,757.29x = 18,986.24 × 7,790.01
  4. Step 4: Simplify right side
    13,757.29x = 147,902,999.46
  5. Step 5: Solve for x
    x = 147,902,999.46/13,757.29
  6. Step 6: Final answer
    x = 10,750.88

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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.