Home / 45,321.12-67,991.39-19,010.70

Finding the Fourth Proportional to 45,321.12, 67,991.39 and 19,010.70

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Solution

The fourth proportional to 45,321.12, 67,991.39 and 19,010.70 is: 28,520.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,321.12 : 67,991.39 = 19,010.70 : x
  2. Step 2: Convert to fraction form
    45,321.12/67,991.39 = 19,010.70/x
  3. Step 3: Cross multiply
    45,321.12x = 67,991.39 × 19,010.70
  4. Step 4: Simplify right side
    45,321.12x = 1,292,563,917.87
  5. Step 5: Solve for x
    x = 1,292,563,917.87/45,321.12
  6. Step 6: Final answer
    x = 28,520.12

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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.