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Finding the Fourth Proportional to 12,461.40, 18,692.10 and 8,314.20

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Solution

The fourth proportional to 12,461.40, 18,692.10 and 8,314.20 is: 12,471.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,461.40 : 18,692.10 = 8,314.20 : x
  2. Step 2: Convert to fraction form
    12,461.40/18,692.10 = 8,314.20/x
  3. Step 3: Cross multiply
    12,461.40x = 18,692.10 × 8,314.20
  4. Step 4: Simplify right side
    12,461.40x = 155,409,857.82
  5. Step 5: Solve for x
    x = 155,409,857.82/12,461.40
  6. Step 6: Final answer
    x = 12,471.30

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Similar ratio
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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.