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Finding the Fourth Proportional to 18,123.72, 25,012 and 10,057.79

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Solution

The fourth proportional to 18,123.72, 25,012 and 10,057.79 is: 13,880.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,123.72 : 25,012 = 10,057.79 : x
  2. Step 2: Convert to fraction form
    18,123.72/25,012 = 10,057.79/x
  3. Step 3: Cross multiply
    18,123.72x = 25,012 × 10,057.79
  4. Step 4: Simplify right side
    18,123.72x = 251,565,443.48
  5. Step 5: Solve for x
    x = 251,565,443.48/18,123.72
  6. Step 6: Final answer
    x = 13,880.45

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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.