Home / 9,355.23-12,912.43-5,378.65

Finding the Fourth Proportional to 9,355.23, 12,912.43 and 5,378.65

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Solution

The fourth proportional to 9,355.23, 12,912.43 and 5,378.65 is: 7,423.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,355.23 : 12,912.43 = 5,378.65 : x
  2. Step 2: Convert to fraction form
    9,355.23/12,912.43 = 5,378.65/x
  3. Step 3: Cross multiply
    9,355.23x = 12,912.43 × 5,378.65
  4. Step 4: Simplify right side
    9,355.23x = 69,451,441.62
  5. Step 5: Solve for x
    x = 69,451,441.62/9,355.23
  6. Step 6: Final answer
    x = 7,423.81

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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.