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Finding the Fourth Proportional to 18,739, 25,860.18 and 10,355.32

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Solution

The fourth proportional to 18,739, 25,860.18 and 10,355.32 is: 14,290.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739 : 25,860.18 = 10,355.32 : x
  2. Step 2: Convert to fraction form
    18,739/25,860.18 = 10,355.32/x
  3. Step 3: Cross multiply
    18,739x = 25,860.18 × 10,355.32
  4. Step 4: Simplify right side
    18,739x = 267,790,439.16
  5. Step 5: Solve for x
    x = 267,790,439.16/18,739
  6. Step 6: Final answer
    x = 14,290.54

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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.