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Finding the Fourth Proportional to 8,415.45, 12,623.18 and 5,134.95

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Solution

The fourth proportional to 8,415.45, 12,623.18 and 5,134.95 is: 7,702.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.45 : 12,623.18 = 5,134.95 : x
  2. Step 2: Convert to fraction form
    8,415.45/12,623.18 = 5,134.95/x
  3. Step 3: Cross multiply
    8,415.45x = 12,623.18 × 5,134.95
  4. Step 4: Simplify right side
    8,415.45x = 64,819,372.47
  5. Step 5: Solve for x
    x = 64,819,372.47/8,415.45
  6. Step 6: Final answer
    x = 7,702.43

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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.