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Finding the Fourth Proportional to 8,415.13, 12,622.71 and 8,402.98

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Solution

The fourth proportional to 8,415.13, 12,622.71 and 8,402.98 is: 12,604.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.13 : 12,622.71 = 8,402.98 : x
  2. Step 2: Convert to fraction form
    8,415.13/12,622.71 = 8,402.98/x
  3. Step 3: Cross multiply
    8,415.13x = 12,622.71 × 8,402.98
  4. Step 4: Simplify right side
    8,415.13x = 106,068,379.68
  5. Step 5: Solve for x
    x = 106,068,379.68/8,415.13
  6. Step 6: Final answer
    x = 12,604.48

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Double scale
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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.