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Finding the Fourth Proportional to 8,415.35, 12,623.03 and 6,447.05

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Solution

The fourth proportional to 8,415.35, 12,623.03 and 6,447.05 is: 9,670.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.35 : 12,623.03 = 6,447.05 : x
  2. Step 2: Convert to fraction form
    8,415.35/12,623.03 = 6,447.05/x
  3. Step 3: Cross multiply
    8,415.35x = 12,623.03 × 6,447.05
  4. Step 4: Simplify right side
    8,415.35x = 81,381,273.33
  5. Step 5: Solve for x
    x = 81,381,273.33/8,415.35
  6. Step 6: Final answer
    x = 9,670.58

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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.