Home / 9,378.20-12,942.70-5,400.60

Finding the Fourth Proportional to 9,378.20, 12,942.70 and 5,400.60

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Solution

The fourth proportional to 9,378.20, 12,942.70 and 5,400.60 is: 7,453.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.20 : 12,942.70 = 5,400.60 : x
  2. Step 2: Convert to fraction form
    9,378.20/12,942.70 = 5,400.60/x
  3. Step 3: Cross multiply
    9,378.20x = 12,942.70 × 5,400.60
  4. Step 4: Simplify right side
    9,378.20x = 69,898,345.62
  5. Step 5: Solve for x
    x = 69,898,345.62/9,378.20
  6. Step 6: Final answer
    x = 7,453.28

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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.