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Finding the Fourth Proportional to 45,343.25, 68,018.80 and 12,511.25

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Solution

The fourth proportional to 45,343.25, 68,018.80 and 12,511.25 is: 18,767.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,343.25 : 68,018.80 = 12,511.25 : x
  2. Step 2: Convert to fraction form
    45,343.25/68,018.80 = 12,511.25/x
  3. Step 3: Cross multiply
    45,343.25x = 68,018.80 × 12,511.25
  4. Step 4: Simplify right side
    45,343.25x = 851,000,148.94
  5. Step 5: Solve for x
    x = 851,000,148.94/45,343.25
  6. Step 6: Final answer
    x = 18,767.96

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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.