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Finding the Fourth Proportional to 31,100, 46,649.82 and 11,379.92

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Solution

The fourth proportional to 31,100, 46,649.82 and 11,379.92 is: 17,069.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,100 : 46,649.82 = 11,379.92 : x
  2. Step 2: Convert to fraction form
    31,100/46,649.82 = 11,379.92/x
  3. Step 3: Cross multiply
    31,100x = 46,649.82 × 11,379.92
  4. Step 4: Simplify right side
    31,100x = 530,871,219.61
  5. Step 5: Solve for x
    x = 530,871,219.61/31,100
  6. Step 6: Final answer
    x = 17,069.81

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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.