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Finding the Fourth Proportional to 11,170.52, 15,411.03 and 6,389.50

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Solution

The fourth proportional to 11,170.52, 15,411.03 and 6,389.50 is: 8,815.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,170.52 : 15,411.03 = 6,389.50 : x
  2. Step 2: Convert to fraction form
    11,170.52/15,411.03 = 6,389.50/x
  3. Step 3: Cross multiply
    11,170.52x = 15,411.03 × 6,389.50
  4. Step 4: Simplify right side
    11,170.52x = 98,468,796.50
  5. Step 5: Solve for x
    x = 98,468,796.50/11,170.52
  6. Step 6: Final answer
    x = 8,815.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.