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Finding the Fourth Proportional to 11,319, 15,621.72 and 6,351

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Solution

The fourth proportional to 11,319, 15,621.72 and 6,351 is: 8,765.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,319 : 15,621.72 = 6,351 : x
  2. Step 2: Convert to fraction form
    11,319/15,621.72 = 6,351/x
  3. Step 3: Cross multiply
    11,319x = 15,621.72 × 6,351
  4. Step 4: Simplify right side
    11,319x = 99,213,543.72
  5. Step 5: Solve for x
    x = 99,213,543.72/11,319
  6. Step 6: Final answer
    x = 8,765.22

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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.