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Finding the Fourth Proportional to 11,356.56, 15,672.06 and 6,388.56

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Solution

The fourth proportional to 11,356.56, 15,672.06 and 6,388.56 is: 8,816.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,356.56 : 15,672.06 = 6,388.56 : x
  2. Step 2: Convert to fraction form
    11,356.56/15,672.06 = 6,388.56/x
  3. Step 3: Cross multiply
    11,356.56x = 15,672.06 × 6,388.56
  4. Step 4: Simplify right side
    11,356.56x = 100,121,895.63
  5. Step 5: Solve for x
    x = 100,121,895.63/11,356.56
  6. Step 6: Final answer
    x = 8,816.22

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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.