Home / 8,620.39-12,930.63-3,426.28

Finding the Fourth Proportional to 8,620.39, 12,930.63 and 3,426.28

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Solution

The fourth proportional to 8,620.39, 12,930.63 and 3,426.28 is: 5,139.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.39 : 12,930.63 = 3,426.28 : x
  2. Step 2: Convert to fraction form
    8,620.39/12,930.63 = 3,426.28/x
  3. Step 3: Cross multiply
    8,620.39x = 12,930.63 × 3,426.28
  4. Step 4: Simplify right side
    8,620.39x = 44,303,958.96
  5. Step 5: Solve for x
    x = 44,303,958.96/8,620.39
  6. Step 6: Final answer
    x = 5,139.44

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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.