Home / 7,768.80-11,653.20-7,428.60

Finding the Fourth Proportional to 7,768.80, 11,653.20 and 7,428.60

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Solution

The fourth proportional to 7,768.80, 11,653.20 and 7,428.60 is: 11,142.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,768.80 : 11,653.20 = 7,428.60 : x
  2. Step 2: Convert to fraction form
    7,768.80/11,653.20 = 7,428.60/x
  3. Step 3: Cross multiply
    7,768.80x = 11,653.20 × 7,428.60
  4. Step 4: Simplify right side
    7,768.80x = 86,566,961.52
  5. Step 5: Solve for x
    x = 86,566,961.52/7,768.80
  6. Step 6: Final answer
    x = 11,142.90

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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.