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Finding the Fourth Proportional to 30,715.50, 46,080.81 and 9,939

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Solution

The fourth proportional to 30,715.50, 46,080.81 and 9,939 is: 14,910.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,715.50 : 46,080.81 = 9,939 : x
  2. Step 2: Convert to fraction form
    30,715.50/46,080.81 = 9,939/x
  3. Step 3: Cross multiply
    30,715.50x = 46,080.81 × 9,939
  4. Step 4: Simplify right side
    30,715.50x = 457,997,170.59
  5. Step 5: Solve for x
    x = 457,997,170.59/30,715.50
  6. Step 6: Final answer
    x = 14,910.95

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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.