Home / 12,213.12-18,319.64-6,381.12

Finding the Fourth Proportional to 12,213.12, 18,319.64 and 6,381.12

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Solution

The fourth proportional to 12,213.12, 18,319.64 and 6,381.12 is: 9,571.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.12 : 18,319.64 = 6,381.12 : x
  2. Step 2: Convert to fraction form
    12,213.12/18,319.64 = 6,381.12/x
  3. Step 3: Cross multiply
    12,213.12x = 18,319.64 × 6,381.12
  4. Step 4: Simplify right side
    12,213.12x = 116,899,821.20
  5. Step 5: Solve for x
    x = 116,899,821.20/12,213.12
  6. Step 6: Final answer
    x = 9,571.66

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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.