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Finding the Fourth Proportional to 13,055.54, 18,016.53 and 7,087.21

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Solution

The fourth proportional to 13,055.54, 18,016.53 and 7,087.21 is: 9,780.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.54 : 18,016.53 = 7,087.21 : x
  2. Step 2: Convert to fraction form
    13,055.54/18,016.53 = 7,087.21/x
  3. Step 3: Cross multiply
    13,055.54x = 18,016.53 × 7,087.21
  4. Step 4: Simplify right side
    13,055.54x = 127,686,806.06
  5. Step 5: Solve for x
    x = 127,686,806.06/13,055.54
  6. Step 6: Final answer
    x = 9,780.28

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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.