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Finding the Fourth Proportional to 11,172.80, 16,758.99 and 9,429.00

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Solution

The fourth proportional to 11,172.80, 16,758.99 and 9,429.00 is: 14,143.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,172.80 : 16,758.99 = 9,429.00 : x
  2. Step 2: Convert to fraction form
    11,172.80/16,758.99 = 9,429.00/x
  3. Step 3: Cross multiply
    11,172.80x = 16,758.99 × 9,429.00
  4. Step 4: Simplify right side
    11,172.80x = 158,020,593.97
  5. Step 5: Solve for x
    x = 158,020,593.97/11,172.80
  6. Step 6: Final answer
    x = 14,143.33

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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.