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Finding the Fourth Proportional to 11,173.88, 15,419.06 and 6,458.47

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Solution

The fourth proportional to 11,173.88, 15,419.06 and 6,458.47 is: 8,912.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,173.88 : 15,419.06 = 6,458.47 : x
  2. Step 2: Convert to fraction form
    11,173.88/15,419.06 = 6,458.47/x
  3. Step 3: Cross multiply
    11,173.88x = 15,419.06 × 6,458.47
  4. Step 4: Simplify right side
    11,173.88x = 99,583,489.82
  5. Step 5: Solve for x
    x = 99,583,489.82/11,173.88
  6. Step 6: Final answer
    x = 8,912.17

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1.5x scale

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.