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Finding the Fourth Proportional to 11,518.40, 17,234.40 and 7,630.40

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Solution

The fourth proportional to 11,518.40, 17,234.40 and 7,630.40 is: 11,416.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,518.40 : 17,234.40 = 7,630.40 : x
  2. Step 2: Convert to fraction form
    11,518.40/17,234.40 = 7,630.40/x
  3. Step 3: Cross multiply
    11,518.40x = 17,234.40 × 7,630.40
  4. Step 4: Simplify right side
    11,518.40x = 131,505,365.76
  5. Step 5: Solve for x
    x = 131,505,365.76/11,518.40
  6. Step 6: Final answer
    x = 11,416.98

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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.