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Finding the Fourth Proportional to 8,391.99, 12,590.25 and 7,473.86

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Solution

The fourth proportional to 8,391.99, 12,590.25 and 7,473.86 is: 11,212.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.99 : 12,590.25 = 7,473.86 : x
  2. Step 2: Convert to fraction form
    8,391.99/12,590.25 = 7,473.86/x
  3. Step 3: Cross multiply
    8,391.99x = 12,590.25 × 7,473.86
  4. Step 4: Simplify right side
    8,391.99x = 94,097,765.87
  5. Step 5: Solve for x
    x = 94,097,765.87/8,391.99
  6. Step 6: Final answer
    x = 11,212.81

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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.