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Finding the Fourth Proportional to 19,969.90, 29,954.85 and 8,279.98

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Solution

The fourth proportional to 19,969.90, 29,954.85 and 8,279.98 is: 12,419.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,969.90 : 29,954.85 = 8,279.98 : x
  2. Step 2: Convert to fraction form
    19,969.90/29,954.85 = 8,279.98/x
  3. Step 3: Cross multiply
    19,969.90x = 29,954.85 × 8,279.98
  4. Step 4: Simplify right side
    19,969.90x = 248,025,558.90
  5. Step 5: Solve for x
    x = 248,025,558.90/19,969.90
  6. Step 6: Final answer
    x = 12,419.97

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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.