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Finding the Fourth Proportional to 18,491.60, 25,550.90 and 16,129.64

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Solution

The fourth proportional to 18,491.60, 25,550.90 and 16,129.64 is: 22,287.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.60 : 25,550.90 = 16,129.64 : x
  2. Step 2: Convert to fraction form
    18,491.60/25,550.90 = 16,129.64/x
  3. Step 3: Cross multiply
    18,491.60x = 25,550.90 × 16,129.64
  4. Step 4: Simplify right side
    18,491.60x = 412,126,818.68
  5. Step 5: Solve for x
    x = 412,126,818.68/18,491.60
  6. Step 6: Final answer
    x = 22,287.24

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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.