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Finding the Fourth Proportional to 31,998.20, 47,939.70 and 27,390.20

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Solution

The fourth proportional to 31,998.20, 47,939.70 and 27,390.20 is: 41,035.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,998.20 : 47,939.70 = 27,390.20 : x
  2. Step 2: Convert to fraction form
    31,998.20/47,939.70 = 27,390.20/x
  3. Step 3: Cross multiply
    31,998.20x = 47,939.70 × 27,390.20
  4. Step 4: Simplify right side
    31,998.20x = 1,313,077,970.94
  5. Step 5: Solve for x
    x = 1,313,077,970.94/31,998.20
  6. Step 6: Final answer
    x = 41,035.99

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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.