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Finding the Fourth Proportional to 18,872.56, 26,045.04 and 11,319.31

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Solution

The fourth proportional to 18,872.56, 26,045.04 and 11,319.31 is: 15,621.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,872.56 : 26,045.04 = 11,319.31 : x
  2. Step 2: Convert to fraction form
    18,872.56/26,045.04 = 11,319.31/x
  3. Step 3: Cross multiply
    18,872.56x = 26,045.04 × 11,319.31
  4. Step 4: Simplify right side
    18,872.56x = 294,811,881.72
  5. Step 5: Solve for x
    x = 294,811,881.72/18,872.56
  6. Step 6: Final answer
    x = 15,621.19

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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.