Home / 7,780.21-11,660.52-5,555.54

Finding the Fourth Proportional to 7,780.21, 11,660.52 and 5,555.54

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Solution

The fourth proportional to 7,780.21, 11,660.52 and 5,555.54 is: 8,326.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.21 : 11,660.52 = 5,555.54 : x
  2. Step 2: Convert to fraction form
    7,780.21/11,660.52 = 5,555.54/x
  3. Step 3: Cross multiply
    7,780.21x = 11,660.52 × 5,555.54
  4. Step 4: Simplify right side
    7,780.21x = 64,780,485.28
  5. Step 5: Solve for x
    x = 64,780,485.28/7,780.21
  6. Step 6: Final answer
    x = 8,326.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.