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Finding the Fourth Proportional to 11,429.20, 17,127.80 and 9,093.20

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Solution

The fourth proportional to 11,429.20, 17,127.80 and 9,093.20 is: 13,627.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,429.20 : 17,127.80 = 9,093.20 : x
  2. Step 2: Convert to fraction form
    11,429.20/17,127.80 = 9,093.20/x
  3. Step 3: Cross multiply
    11,429.20x = 17,127.80 × 9,093.20
  4. Step 4: Simplify right side
    11,429.20x = 155,746,510.96
  5. Step 5: Solve for x
    x = 155,746,510.96/11,429.20
  6. Step 6: Final answer
    x = 13,627.07

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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.