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Finding the Fourth Proportional to 19,929.40, 29,894.10 and 16,673.20

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Solution

The fourth proportional to 19,929.40, 29,894.10 and 16,673.20 is: 25,009.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,929.40 : 29,894.10 = 16,673.20 : x
  2. Step 2: Convert to fraction form
    19,929.40/29,894.10 = 16,673.20/x
  3. Step 3: Cross multiply
    19,929.40x = 29,894.10 × 16,673.20
  4. Step 4: Simplify right side
    19,929.40x = 498,430,308.12
  5. Step 5: Solve for x
    x = 498,430,308.12/19,929.40
  6. Step 6: Final answer
    x = 25,009.80

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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.