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Finding the Fourth Proportional to 18,671.36, 28,003.12 and 8,276.48

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Solution

The fourth proportional to 18,671.36, 28,003.12 and 8,276.48 is: 12,412.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.36 : 28,003.12 = 8,276.48 : x
  2. Step 2: Convert to fraction form
    18,671.36/28,003.12 = 8,276.48/x
  3. Step 3: Cross multiply
    18,671.36x = 28,003.12 × 8,276.48
  4. Step 4: Simplify right side
    18,671.36x = 231,767,262.62
  5. Step 5: Solve for x
    x = 231,767,262.62/18,671.36
  6. Step 6: Final answer
    x = 12,412.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.