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Finding the Fourth Proportional to 18,701.58, 28,049.64 and 7,608.48

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Solution

The fourth proportional to 18,701.58, 28,049.64 and 7,608.48 is: 11,411.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.58 : 28,049.64 = 7,608.48 : x
  2. Step 2: Convert to fraction form
    18,701.58/28,049.64 = 7,608.48/x
  3. Step 3: Cross multiply
    18,701.58x = 28,049.64 × 7,608.48
  4. Step 4: Simplify right side
    18,701.58x = 213,415,191.81
  5. Step 5: Solve for x
    x = 213,415,191.81/18,701.58
  6. Step 6: Final answer
    x = 11,411.61

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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.