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Finding the Fourth Proportional to 30,608.02, 45,905.96 and 8,415.66

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Solution

The fourth proportional to 30,608.02, 45,905.96 and 8,415.66 is: 12,621.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,608.02 : 45,905.96 = 8,415.66 : x
  2. Step 2: Convert to fraction form
    30,608.02/45,905.96 = 8,415.66/x
  3. Step 3: Cross multiply
    30,608.02x = 45,905.96 × 8,415.66
  4. Step 4: Simplify right side
    30,608.02x = 386,328,951.33
  5. Step 5: Solve for x
    x = 386,328,951.33/30,608.02
  6. Step 6: Final answer
    x = 12,621.82

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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.