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Finding the Fourth Proportional to 22,012.88, 30,379.88 and 12,579.64

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Solution

The fourth proportional to 22,012.88, 30,379.88 and 12,579.64 is: 17,361.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,012.88 : 30,379.88 = 12,579.64 : x
  2. Step 2: Convert to fraction form
    22,012.88/30,379.88 = 12,579.64/x
  3. Step 3: Cross multiply
    22,012.88x = 30,379.88 × 12,579.64
  4. Step 4: Simplify right side
    22,012.88x = 382,167,953.64
  5. Step 5: Solve for x
    x = 382,167,953.64/22,012.88
  6. Step 6: Final answer
    x = 17,361.11

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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.