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Finding the Fourth Proportional to 31,511.99, 43,485.99 and 17,171.95

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Solution

The fourth proportional to 31,511.99, 43,485.99 and 17,171.95 is: 23,696.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,511.99 : 43,485.99 = 17,171.95 : x
  2. Step 2: Convert to fraction form
    31,511.99/43,485.99 = 17,171.95/x
  3. Step 3: Cross multiply
    31,511.99x = 43,485.99 × 17,171.95
  4. Step 4: Simplify right side
    31,511.99x = 746,739,251.00
  5. Step 5: Solve for x
    x = 746,739,251.00/31,511.99
  6. Step 6: Final answer
    x = 23,696.99

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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.