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Finding the Fourth Proportional to 18,706.20, 28,059.06 and 5,379.51

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Solution

The fourth proportional to 18,706.20, 28,059.06 and 5,379.51 is: 8,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.20 : 28,059.06 = 5,379.51 : x
  2. Step 2: Convert to fraction form
    18,706.20/28,059.06 = 5,379.51/x
  3. Step 3: Cross multiply
    18,706.20x = 28,059.06 × 5,379.51
  4. Step 4: Simplify right side
    18,706.20x = 150,943,993.86
  5. Step 5: Solve for x
    x = 150,943,993.86/18,706.20
  6. Step 6: Final answer
    x = 8,069.20

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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.