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Finding the Fourth Proportional to 13,055.54, 18,016.65 and 7,087.20

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Solution

The fourth proportional to 13,055.54, 18,016.65 and 7,087.20 is: 9,780.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.54 : 18,016.65 = 7,087.20 : x
  2. Step 2: Convert to fraction form
    13,055.54/18,016.65 = 7,087.20/x
  3. Step 3: Cross multiply
    13,055.54x = 18,016.65 × 7,087.20
  4. Step 4: Simplify right side
    13,055.54x = 127,687,601.88
  5. Step 5: Solve for x
    x = 127,687,601.88/13,055.54
  6. Step 6: Final answer
    x = 9,780.34

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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.