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Finding the Fourth Proportional to 29,964.80, 41,308.80 and 20,518.40

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Solution

The fourth proportional to 29,964.80, 41,308.80 and 20,518.40 is: 28,286.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,964.80 : 41,308.80 = 20,518.40 : x
  2. Step 2: Convert to fraction form
    29,964.80/41,308.80 = 20,518.40/x
  3. Step 3: Cross multiply
    29,964.80x = 41,308.80 × 20,518.40
  4. Step 4: Simplify right side
    29,964.80x = 847,590,481.92
  5. Step 5: Solve for x
    x = 847,590,481.92/29,964.80
  6. Step 6: Final answer
    x = 28,286.21

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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.