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Finding the Fourth Proportional to 9,361.75, 12,921.33 and 6,378.76

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Solution

The fourth proportional to 9,361.75, 12,921.33 and 6,378.76 is: 8,804.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,361.75 : 12,921.33 = 6,378.76 : x
  2. Step 2: Convert to fraction form
    9,361.75/12,921.33 = 6,378.76/x
  3. Step 3: Cross multiply
    9,361.75x = 12,921.33 × 6,378.76
  4. Step 4: Simplify right side
    9,361.75x = 82,422,062.95
  5. Step 5: Solve for x
    x = 82,422,062.95/9,361.75
  6. Step 6: Final answer
    x = 8,804.13

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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.