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Finding the Fourth Proportional to 29,949.80, 44,930.10 and 12,421.40

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Solution

The fourth proportional to 29,949.80, 44,930.10 and 12,421.40 is: 18,634.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,949.80 : 44,930.10 = 12,421.40 : x
  2. Step 2: Convert to fraction form
    29,949.80/44,930.10 = 12,421.40/x
  3. Step 3: Cross multiply
    29,949.80x = 44,930.10 × 12,421.40
  4. Step 4: Simplify right side
    29,949.80x = 558,094,744.14
  5. Step 5: Solve for x
    x = 558,094,744.14/29,949.80
  6. Step 6: Final answer
    x = 18,634.34

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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.