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Finding the Fourth Proportional to 31,573.70, 43,571.70 and 21,519.70

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Solution

The fourth proportional to 31,573.70, 43,571.70 and 21,519.70 is: 29,697.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,573.70 : 43,571.70 = 21,519.70 : x
  2. Step 2: Convert to fraction form
    31,573.70/43,571.70 = 21,519.70/x
  3. Step 3: Cross multiply
    31,573.70x = 43,571.70 × 21,519.70
  4. Step 4: Simplify right side
    31,573.70x = 937,649,993.85
  5. Step 5: Solve for x
    x = 937,649,993.85/31,573.70
  6. Step 6: Final answer
    x = 29,697.19

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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.