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Finding the Fourth Proportional to 18,958.56, 28,417.80 and 9,091.56

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Solution

The fourth proportional to 18,958.56, 28,417.80 and 9,091.56 is: 13,627.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,958.56 : 28,417.80 = 9,091.56 : x
  2. Step 2: Convert to fraction form
    18,958.56/28,417.80 = 9,091.56/x
  3. Step 3: Cross multiply
    18,958.56x = 28,417.80 × 9,091.56
  4. Step 4: Simplify right side
    18,958.56x = 258,362,133.77
  5. Step 5: Solve for x
    x = 258,362,133.77/18,958.56
  6. Step 6: Final answer
    x = 13,627.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.