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Finding the Fourth Proportional to 18,916.96, 26,079.96 and 13,244.08

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Solution

The fourth proportional to 18,916.96, 26,079.96 and 13,244.08 is: 18,259.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.96 : 26,079.96 = 13,244.08 : x
  2. Step 2: Convert to fraction form
    18,916.96/26,079.96 = 13,244.08/x
  3. Step 3: Cross multiply
    18,916.96x = 26,079.96 × 13,244.08
  4. Step 4: Simplify right side
    18,916.96x = 345,405,076.64
  5. Step 5: Solve for x
    x = 345,405,076.64/18,916.96
  6. Step 6: Final answer
    x = 18,259.02

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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.