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Finding the Fourth Proportional to 18,955.89, 26,153.87 and 12,241.80

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Solution

The fourth proportional to 18,955.89, 26,153.87 and 12,241.80 is: 16,890.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.89 : 26,153.87 = 12,241.80 : x
  2. Step 2: Convert to fraction form
    18,955.89/26,153.87 = 12,241.80/x
  3. Step 3: Cross multiply
    18,955.89x = 26,153.87 × 12,241.80
  4. Step 4: Simplify right side
    18,955.89x = 320,170,445.77
  5. Step 5: Solve for x
    x = 320,170,445.77/18,955.89
  6. Step 6: Final answer
    x = 16,890.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.