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Finding the Fourth Proportional to 8,647.38, 11,921.36 and 7,308.54

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Solution

The fourth proportional to 8,647.38, 11,921.36 and 7,308.54 is: 10,075.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,647.38 : 11,921.36 = 7,308.54 : x
  2. Step 2: Convert to fraction form
    8,647.38/11,921.36 = 7,308.54/x
  3. Step 3: Cross multiply
    8,647.38x = 11,921.36 × 7,308.54
  4. Step 4: Simplify right side
    8,647.38x = 87,127,699.87
  5. Step 5: Solve for x
    x = 87,127,699.87/8,647.38
  6. Step 6: Final answer
    x = 10,075.62

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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.