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Finding the Fourth Proportional to 19,958.40, 29,944.08 and 12,169.44

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Solution

The fourth proportional to 19,958.40, 29,944.08 and 12,169.44 is: 18,258.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,958.40 : 29,944.08 = 12,169.44 : x
  2. Step 2: Convert to fraction form
    19,958.40/29,944.08 = 12,169.44/x
  3. Step 3: Cross multiply
    19,958.40x = 29,944.08 × 12,169.44
  4. Step 4: Simplify right side
    19,958.40x = 364,402,684.92
  5. Step 5: Solve for x
    x = 364,402,684.92/19,958.40
  6. Step 6: Final answer
    x = 18,258.11

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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.