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Finding the Fourth Proportional to 36,812.88, 55,213.56 and 12,188.88

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Solution

The fourth proportional to 36,812.88, 55,213.56 and 12,188.88 is: 18,281.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,812.88 : 55,213.56 = 12,188.88 : x
  2. Step 2: Convert to fraction form
    36,812.88/55,213.56 = 12,188.88/x
  3. Step 3: Cross multiply
    36,812.88x = 55,213.56 × 12,188.88
  4. Step 4: Simplify right side
    36,812.88x = 672,991,457.21
  5. Step 5: Solve for x
    x = 672,991,457.21/36,812.88
  6. Step 6: Final answer
    x = 18,281.41

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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.