Home / 8,765.12-13,147.68-2,921.36

Finding the Fourth Proportional to 8,765.12, 13,147.68 and 2,921.36

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Solution

The fourth proportional to 8,765.12, 13,147.68 and 2,921.36 is: 4,382.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.12 : 13,147.68 = 2,921.36 : x
  2. Step 2: Convert to fraction form
    8,765.12/13,147.68 = 2,921.36/x
  3. Step 3: Cross multiply
    8,765.12x = 13,147.68 × 2,921.36
  4. Step 4: Simplify right side
    8,765.12x = 38,409,106.44
  5. Step 5: Solve for x
    x = 38,409,106.44/8,765.12
  6. Step 6: Final answer
    x = 4,382.04

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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.