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Finding the Fourth Proportional to 11,353.50, 17,031.21 and 3,145.50

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Solution

The fourth proportional to 11,353.50, 17,031.21 and 3,145.50 is: 4,718.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,353.50 : 17,031.21 = 3,145.50 : x
  2. Step 2: Convert to fraction form
    11,353.50/17,031.21 = 3,145.50/x
  3. Step 3: Cross multiply
    11,353.50x = 17,031.21 × 3,145.50
  4. Step 4: Simplify right side
    11,353.50x = 53,571,671.06
  5. Step 5: Solve for x
    x = 53,571,671.06/11,353.50
  6. Step 6: Final answer
    x = 4,718.52

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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.