Home / 21,678.72-29,914.48-12,245.44

Finding the Fourth Proportional to 21,678.72, 29,914.48 and 12,245.44

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Solution

The fourth proportional to 21,678.72, 29,914.48 and 12,245.44 is: 16,897.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,678.72 : 29,914.48 = 12,245.44 : x
  2. Step 2: Convert to fraction form
    21,678.72/29,914.48 = 12,245.44/x
  3. Step 3: Cross multiply
    21,678.72x = 29,914.48 × 12,245.44
  4. Step 4: Simplify right side
    21,678.72x = 366,315,969.97
  5. Step 5: Solve for x
    x = 366,315,969.97/21,678.72
  6. Step 6: Final answer
    x = 16,897.49

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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.