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Finding the Fourth Proportional to 13,708.44, 18,908.28 and 8,679.06

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Solution

The fourth proportional to 13,708.44, 18,908.28 and 8,679.06 is: 11,971.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.44 : 18,908.28 = 8,679.06 : x
  2. Step 2: Convert to fraction form
    13,708.44/18,908.28 = 8,679.06/x
  3. Step 3: Cross multiply
    13,708.44x = 18,908.28 × 8,679.06
  4. Step 4: Simplify right side
    13,708.44x = 164,106,096.62
  5. Step 5: Solve for x
    x = 164,106,096.62/13,708.44
  6. Step 6: Final answer
    x = 11,971.17

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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.