Home / 8,921.12-13,381.56-2,765.12

Finding the Fourth Proportional to 8,921.12, 13,381.56 and 2,765.12

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Solution

The fourth proportional to 8,921.12, 13,381.56 and 2,765.12 is: 4,147.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.12 : 13,381.56 = 2,765.12 : x
  2. Step 2: Convert to fraction form
    8,921.12/13,381.56 = 2,765.12/x
  3. Step 3: Cross multiply
    8,921.12x = 13,381.56 × 2,765.12
  4. Step 4: Simplify right side
    8,921.12x = 37,001,619.19
  5. Step 5: Solve for x
    x = 37,001,619.19/8,921.12
  6. Step 6: Final answer
    x = 4,147.64

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1.5x scale

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.