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Finding the Fourth Proportional to 11,388.32, 15,716 and 6,353

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Solution

The fourth proportional to 11,388.32, 15,716 and 6,353 is: 8,767.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,388.32 : 15,716 = 6,353 : x
  2. Step 2: Convert to fraction form
    11,388.32/15,716 = 6,353/x
  3. Step 3: Cross multiply
    11,388.32x = 15,716 × 6,353
  4. Step 4: Simplify right side
    11,388.32x = 99,843,748
  5. Step 5: Solve for x
    x = 99,843,748/11,388.32
  6. Step 6: Final answer
    x = 8,767.21

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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.