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Finding the Fourth Proportional to 11,887.85, 17,819.13 and 4,489.16

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Solution

The fourth proportional to 11,887.85, 17,819.13 and 4,489.16 is: 6,728.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,887.85 : 17,819.13 = 4,489.16 : x
  2. Step 2: Convert to fraction form
    11,887.85/17,819.13 = 4,489.16/x
  3. Step 3: Cross multiply
    11,887.85x = 17,819.13 × 4,489.16
  4. Step 4: Simplify right side
    11,887.85x = 79,992,925.63
  5. Step 5: Solve for x
    x = 79,992,925.63/11,887.85
  6. Step 6: Final answer
    x = 6,728.96

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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.