Home / 12,849.60-19,288.80-9,940.80

Finding the Fourth Proportional to 12,849.60, 19,288.80 and 9,940.80

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Solution

The fourth proportional to 12,849.60, 19,288.80 and 9,940.80 is: 14,922.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,849.60 : 19,288.80 = 9,940.80 : x
  2. Step 2: Convert to fraction form
    12,849.60/19,288.80 = 9,940.80/x
  3. Step 3: Cross multiply
    12,849.60x = 19,288.80 × 9,940.80
  4. Step 4: Simplify right side
    12,849.60x = 191,746,103.04
  5. Step 5: Solve for x
    x = 191,746,103.04/12,849.60
  6. Step 6: Final answer
    x = 14,922.34

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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.