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Finding the Fourth Proportional to 18,859.75, 28,290.21 and 7,016.47

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Solution

The fourth proportional to 18,859.75, 28,290.21 and 7,016.47 is: 10,524.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.75 : 28,290.21 = 7,016.47 : x
  2. Step 2: Convert to fraction form
    18,859.75/28,290.21 = 7,016.47/x
  3. Step 3: Cross multiply
    18,859.75x = 28,290.21 × 7,016.47
  4. Step 4: Simplify right side
    18,859.75x = 198,497,409.76
  5. Step 5: Solve for x
    x = 198,497,409.76/18,859.75
  6. Step 6: Final answer
    x = 10,524.92

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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.