Home / 9,157.82-12,639.64-5,382.21

Finding the Fourth Proportional to 9,157.82, 12,639.64 and 5,382.21

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Solution

The fourth proportional to 9,157.82, 12,639.64 and 5,382.21 is: 7,428.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,157.82 : 12,639.64 = 5,382.21 : x
  2. Step 2: Convert to fraction form
    9,157.82/12,639.64 = 5,382.21/x
  3. Step 3: Cross multiply
    9,157.82x = 12,639.64 × 5,382.21
  4. Step 4: Simplify right side
    9,157.82x = 68,029,183.35
  5. Step 5: Solve for x
    x = 68,029,183.35/9,157.82
  6. Step 6: Final answer
    x = 7,428.53

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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.