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Finding the Fourth Proportional to 8,393.39, 12,590.02 and 3,128.22

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Solution

The fourth proportional to 8,393.39, 12,590.02 and 3,128.22 is: 4,692.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,393.39 : 12,590.02 = 3,128.22 : x
  2. Step 2: Convert to fraction form
    8,393.39/12,590.02 = 3,128.22/x
  3. Step 3: Cross multiply
    8,393.39x = 12,590.02 × 3,128.22
  4. Step 4: Simplify right side
    8,393.39x = 39,384,338.68
  5. Step 5: Solve for x
    x = 39,384,338.68/8,393.39
  6. Step 6: Final answer
    x = 4,692.30

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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.