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Finding the Fourth Proportional to 8,461.53, 12,692.71 and 2,221.56

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Solution

The fourth proportional to 8,461.53, 12,692.71 and 2,221.56 is: 3,332.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,461.53 : 12,692.71 = 2,221.56 : x
  2. Step 2: Convert to fraction form
    8,461.53/12,692.71 = 2,221.56/x
  3. Step 3: Cross multiply
    8,461.53x = 12,692.71 × 2,221.56
  4. Step 4: Simplify right side
    8,461.53x = 28,197,616.83
  5. Step 5: Solve for x
    x = 28,197,616.83/8,461.53
  6. Step 6: Final answer
    x = 3,332.45

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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.