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Finding the Fourth Proportional to 31,911.92, 44,040.84 and 18,486.80

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Solution

The fourth proportional to 31,911.92, 44,040.84 and 18,486.80 is: 25,513.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,911.92 : 44,040.84 = 18,486.80 : x
  2. Step 2: Convert to fraction form
    31,911.92/44,040.84 = 18,486.80/x
  3. Step 3: Cross multiply
    31,911.92x = 44,040.84 × 18,486.80
  4. Step 4: Simplify right side
    31,911.92x = 814,174,200.91
  5. Step 5: Solve for x
    x = 814,174,200.91/31,911.92
  6. Step 6: Final answer
    x = 25,513.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.