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Finding the Fourth Proportional to 11,590.20, 17,390.70 and 8,674.20

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Solution

The fourth proportional to 11,590.20, 17,390.70 and 8,674.20 is: 13,015.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,590.20 : 17,390.70 = 8,674.20 : x
  2. Step 2: Convert to fraction form
    11,590.20/17,390.70 = 8,674.20/x
  3. Step 3: Cross multiply
    11,590.20x = 17,390.70 × 8,674.20
  4. Step 4: Simplify right side
    11,590.20x = 150,850,409.94
  5. Step 5: Solve for x
    x = 150,850,409.94/11,590.20
  6. Step 6: Final answer
    x = 13,015.34

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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.