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Finding the Fourth Proportional to 18,671.63, 28,011.80 and 6,190.74

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Solution

The fourth proportional to 18,671.63, 28,011.80 and 6,190.74 is: 9,287.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.63 : 28,011.80 = 6,190.74 : x
  2. Step 2: Convert to fraction form
    18,671.63/28,011.80 = 6,190.74/x
  3. Step 3: Cross multiply
    18,671.63x = 28,011.80 × 6,190.74
  4. Step 4: Simplify right side
    18,671.63x = 173,413,770.73
  5. Step 5: Solve for x
    x = 173,413,770.73/18,671.63
  6. Step 6: Final answer
    x = 9,287.55

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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.