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Finding the Fourth Proportional to 18,806.87, 28,210.86 and 8,271.43

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Solution

The fourth proportional to 18,806.87, 28,210.86 and 8,271.43 is: 12,407.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.87 : 28,210.86 = 8,271.43 : x
  2. Step 2: Convert to fraction form
    18,806.87/28,210.86 = 8,271.43/x
  3. Step 3: Cross multiply
    18,806.87x = 28,210.86 × 8,271.43
  4. Step 4: Simplify right side
    18,806.87x = 233,344,012.68
  5. Step 5: Solve for x
    x = 233,344,012.68/18,806.87
  6. Step 6: Final answer
    x = 12,407.38

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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.