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Finding the Fourth Proportional to 11,961.12, 16,507.12 and 7,245.84

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Solution

The fourth proportional to 11,961.12, 16,507.12 and 7,245.84 is: 9,999.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,961.12 : 16,507.12 = 7,245.84 : x
  2. Step 2: Convert to fraction form
    11,961.12/16,507.12 = 7,245.84/x
  3. Step 3: Cross multiply
    11,961.12x = 16,507.12 × 7,245.84
  4. Step 4: Simplify right side
    11,961.12x = 119,607,950.38
  5. Step 5: Solve for x
    x = 119,607,950.38/11,961.12
  6. Step 6: Final answer
    x = 9,999.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.