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Finding the Fourth Proportional to 8,765.15, 13,137.99 and 6,678.28

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Solution

The fourth proportional to 8,765.15, 13,137.99 and 6,678.28 is: 10,010.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.15 : 13,137.99 = 6,678.28 : x
  2. Step 2: Convert to fraction form
    8,765.15/13,137.99 = 6,678.28/x
  3. Step 3: Cross multiply
    8,765.15x = 13,137.99 × 6,678.28
  4. Step 4: Simplify right side
    8,765.15x = 87,739,174.11
  5. Step 5: Solve for x
    x = 87,739,174.11/8,765.15
  6. Step 6: Final answer
    x = 10,010.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.