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Finding the Fourth Proportional to 18,811.98, 28,200.42 and 6,959.16

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Solution

The fourth proportional to 18,811.98, 28,200.42 and 6,959.16 is: 10,432.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.98 : 28,200.42 = 6,959.16 : x
  2. Step 2: Convert to fraction form
    18,811.98/28,200.42 = 6,959.16/x
  3. Step 3: Cross multiply
    18,811.98x = 28,200.42 × 6,959.16
  4. Step 4: Simplify right side
    18,811.98x = 196,251,234.85
  5. Step 5: Solve for x
    x = 196,251,234.85/18,811.98
  6. Step 6: Final answer
    x = 10,432.25

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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.