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Finding the Fourth Proportional to 13,507.92, 18,644.04 and 7,920.72

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Solution

The fourth proportional to 13,507.92, 18,644.04 and 7,920.72 is: 10,932.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,507.92 : 18,644.04 = 7,920.72 : x
  2. Step 2: Convert to fraction form
    13,507.92/18,644.04 = 7,920.72/x
  3. Step 3: Cross multiply
    13,507.92x = 18,644.04 × 7,920.72
  4. Step 4: Simplify right side
    13,507.92x = 147,674,220.51
  5. Step 5: Solve for x
    x = 147,674,220.51/13,507.92
  6. Step 6: Final answer
    x = 10,932.42

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.