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Finding the Fourth Proportional to 12,612.55, 18,912.48 and 7,349.26

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Solution

The fourth proportional to 12,612.55, 18,912.48 and 7,349.26 is: 11,020.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.55 : 18,912.48 = 7,349.26 : x
  2. Step 2: Convert to fraction form
    12,612.55/18,912.48 = 7,349.26/x
  3. Step 3: Cross multiply
    12,612.55x = 18,912.48 × 7,349.26
  4. Step 4: Simplify right side
    12,612.55x = 138,992,732.76
  5. Step 5: Solve for x
    x = 138,992,732.76/12,612.55
  6. Step 6: Final answer
    x = 11,020.19

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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.