Home / 12,780.38-19,171.37-4,015.62

Finding the Fourth Proportional to 12,780.38, 19,171.37 and 4,015.62

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Solution

The fourth proportional to 12,780.38, 19,171.37 and 4,015.62 is: 6,023.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.38 : 19,171.37 = 4,015.62 : x
  2. Step 2: Convert to fraction form
    12,780.38/19,171.37 = 4,015.62/x
  3. Step 3: Cross multiply
    12,780.38x = 19,171.37 × 4,015.62
  4. Step 4: Simplify right side
    12,780.38x = 76,984,936.80
  5. Step 5: Solve for x
    x = 76,984,936.80/12,780.38
  6. Step 6: Final answer
    x = 6,023.68

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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.