Home / 7,780.20-10,736.78-4,243.60

Finding the Fourth Proportional to 7,780.20, 10,736.78 and 4,243.60

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Solution

The fourth proportional to 7,780.20, 10,736.78 and 4,243.60 is: 5,856.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.20 : 10,736.78 = 4,243.60 : x
  2. Step 2: Convert to fraction form
    7,780.20/10,736.78 = 4,243.60/x
  3. Step 3: Cross multiply
    7,780.20x = 10,736.78 × 4,243.60
  4. Step 4: Simplify right side
    7,780.20x = 45,562,599.61
  5. Step 5: Solve for x
    x = 45,562,599.61/7,780.20
  6. Step 6: Final answer
    x = 5,856.22

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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.