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Finding the Fourth Proportional to 7,798.80, 11,698.20 and 7,458.60

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Solution

The fourth proportional to 7,798.80, 11,698.20 and 7,458.60 is: 11,187.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,798.80 : 11,698.20 = 7,458.60 : x
  2. Step 2: Convert to fraction form
    7,798.80/11,698.20 = 7,458.60/x
  3. Step 3: Cross multiply
    7,798.80x = 11,698.20 × 7,458.60
  4. Step 4: Simplify right side
    7,798.80x = 87,252,194.52
  5. Step 5: Solve for x
    x = 87,252,194.52/7,798.80
  6. Step 6: Final answer
    x = 11,187.90

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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.