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Finding the Fourth Proportional to 7,164.34, 9,886.84 and 4,020.54

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Solution

The fourth proportional to 7,164.34, 9,886.84 and 4,020.54 is: 5,548.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,164.34 : 9,886.84 = 4,020.54 : x
  2. Step 2: Convert to fraction form
    7,164.34/9,886.84 = 4,020.54/x
  3. Step 3: Cross multiply
    7,164.34x = 9,886.84 × 4,020.54
  4. Step 4: Simplify right side
    7,164.34x = 39,750,435.69
  5. Step 5: Solve for x
    x = 39,750,435.69/7,164.34
  6. Step 6: Final answer
    x = 5,548.37

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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.