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Finding the Fourth Proportional to 12,612.72, 18,872.37 and 7,895.14

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Solution

The fourth proportional to 12,612.72, 18,872.37 and 7,895.14 is: 11,813.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.72 : 18,872.37 = 7,895.14 : x
  2. Step 2: Convert to fraction form
    12,612.72/18,872.37 = 7,895.14/x
  3. Step 3: Cross multiply
    12,612.72x = 18,872.37 × 7,895.14
  4. Step 4: Simplify right side
    12,612.72x = 149,000,003.28
  5. Step 5: Solve for x
    x = 149,000,003.28/12,612.72
  6. Step 6: Final answer
    x = 11,813.47

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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.