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Finding the Fourth Proportional to 18,378.85, 25,358.90 and 10,822.43

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Solution

The fourth proportional to 18,378.85, 25,358.90 and 10,822.43 is: 14,932.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.85 : 25,358.90 = 10,822.43 : x
  2. Step 2: Convert to fraction form
    18,378.85/25,358.90 = 10,822.43/x
  3. Step 3: Cross multiply
    18,378.85x = 25,358.90 × 10,822.43
  4. Step 4: Simplify right side
    18,378.85x = 274,444,766.28
  5. Step 5: Solve for x
    x = 274,444,766.28/18,378.85
  6. Step 6: Final answer
    x = 14,932.64

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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.