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Finding the Fourth Proportional to 13,055.45, 18,016.53 and 7,087.11

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Solution

The fourth proportional to 13,055.45, 18,016.53 and 7,087.11 is: 9,780.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.45 : 18,016.53 = 7,087.11 : x
  2. Step 2: Convert to fraction form
    13,055.45/18,016.53 = 7,087.11/x
  3. Step 3: Cross multiply
    13,055.45x = 18,016.53 × 7,087.11
  4. Step 4: Simplify right side
    13,055.45x = 127,685,129.93
  5. Step 5: Solve for x
    x = 127,685,129.93/13,055.45
  6. Step 6: Final answer
    x = 9,780.22

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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.