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Finding the Fourth Proportional to 17,978.88, 26,993.60 and 9,220.16

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Solution

The fourth proportional to 17,978.88, 26,993.60 and 9,220.16 is: 13,843.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978.88 : 26,993.60 = 9,220.16 : x
  2. Step 2: Convert to fraction form
    17,978.88/26,993.60 = 9,220.16/x
  3. Step 3: Cross multiply
    17,978.88x = 26,993.60 × 9,220.16
  4. Step 4: Simplify right side
    17,978.88x = 248,885,310.98
  5. Step 5: Solve for x
    x = 248,885,310.98/17,978.88
  6. Step 6: Final answer
    x = 13,843.20

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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.