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Finding the Fourth Proportional to 18,329.81, 25,315.85 and 12,351.10

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Solution

The fourth proportional to 18,329.81, 25,315.85 and 12,351.10 is: 17,058.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,329.81 : 25,315.85 = 12,351.10 : x
  2. Step 2: Convert to fraction form
    18,329.81/25,315.85 = 12,351.10/x
  3. Step 3: Cross multiply
    18,329.81x = 25,315.85 × 12,351.10
  4. Step 4: Simplify right side
    18,329.81x = 312,678,562.52
  5. Step 5: Solve for x
    x = 312,678,562.52/18,329.81
  6. Step 6: Final answer
    x = 17,058.48

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