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Finding the Fourth Proportional to 18,825.12, 25,978.92 and 10,328.04

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Solution

The fourth proportional to 18,825.12, 25,978.92 and 10,328.04 is: 14,252.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,825.12 : 25,978.92 = 10,328.04 : x
  2. Step 2: Convert to fraction form
    18,825.12/25,978.92 = 10,328.04/x
  3. Step 3: Cross multiply
    18,825.12x = 25,978.92 × 10,328.04
  4. Step 4: Simplify right side
    18,825.12x = 268,311,324.92
  5. Step 5: Solve for x
    x = 268,311,324.92/18,825.12
  6. Step 6: Final answer
    x = 14,252.83

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1.5x scale

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.