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Finding the Fourth Proportional to 8,505.25, 12,695.44 and 7,879.01

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Solution

The fourth proportional to 8,505.25, 12,695.44 and 7,879.01 is: 11,760.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.25 : 12,695.44 = 7,879.01 : x
  2. Step 2: Convert to fraction form
    8,505.25/12,695.44 = 7,879.01/x
  3. Step 3: Cross multiply
    8,505.25x = 12,695.44 × 7,879.01
  4. Step 4: Simplify right side
    8,505.25x = 100,027,498.71
  5. Step 5: Solve for x
    x = 100,027,498.71/8,505.25
  6. Step 6: Final answer
    x = 11,760.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.