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Finding the Fourth Proportional to 12,641.89, 18,926.11 and 7,360.79

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Solution

The fourth proportional to 12,641.89, 18,926.11 and 7,360.79 is: 11,019.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.89 : 18,926.11 = 7,360.79 : x
  2. Step 2: Convert to fraction form
    12,641.89/18,926.11 = 7,360.79/x
  3. Step 3: Cross multiply
    12,641.89x = 18,926.11 × 7,360.79
  4. Step 4: Simplify right side
    12,641.89x = 139,311,121.23
  5. Step 5: Solve for x
    x = 139,311,121.23/12,641.89
  6. Step 6: Final answer
    x = 11,019.80

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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.