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Finding the Fourth Proportional to 18,169.60, 25,003.20 and 16,078.72

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Solution

The fourth proportional to 18,169.60, 25,003.20 and 16,078.72 is: 22,125.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,169.60 : 25,003.20 = 16,078.72 : x
  2. Step 2: Convert to fraction form
    18,169.60/25,003.20 = 16,078.72/x
  3. Step 3: Cross multiply
    18,169.60x = 25,003.20 × 16,078.72
  4. Step 4: Simplify right side
    18,169.60x = 402,019,451.90
  5. Step 5: Solve for x
    x = 402,019,451.90/18,169.60
  6. Step 6: Final answer
    x = 22,125.94

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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.