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Finding the Fourth Proportional to 8,461.74, 12,692.31 and 2,221.71

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Solution

The fourth proportional to 8,461.74, 12,692.31 and 2,221.71 is: 3,332.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,461.74 : 12,692.31 = 2,221.71 : x
  2. Step 2: Convert to fraction form
    8,461.74/12,692.31 = 2,221.71/x
  3. Step 3: Cross multiply
    8,461.74x = 12,692.31 × 2,221.71
  4. Step 4: Simplify right side
    8,461.74x = 28,198,632.05
  5. Step 5: Solve for x
    x = 28,198,632.05/8,461.74
  6. Step 6: Final answer
    x = 3,332.49

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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.