Home / 7,782.20-10,739.38-4,245.40

Finding the Fourth Proportional to 7,782.20, 10,739.38 and 4,245.40

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Solution

The fourth proportional to 7,782.20, 10,739.38 and 4,245.40 is: 5,858.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,782.20 : 10,739.38 = 4,245.40 : x
  2. Step 2: Convert to fraction form
    7,782.20/10,739.38 = 4,245.40/x
  3. Step 3: Cross multiply
    7,782.20x = 10,739.38 × 4,245.40
  4. Step 4: Simplify right side
    7,782.20x = 45,592,963.85
  5. Step 5: Solve for x
    x = 45,592,963.85/7,782.20
  6. Step 6: Final answer
    x = 5,858.62

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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.