Home / 30,936.26-42,709.80-21,517.58

Finding the Fourth Proportional to 30,936.26, 42,709.80 and 21,517.58

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Solution

The fourth proportional to 30,936.26, 42,709.80 and 21,517.58 is: 29,706.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,936.26 : 42,709.80 = 21,517.58 : x
  2. Step 2: Convert to fraction form
    30,936.26/42,709.80 = 21,517.58/x
  3. Step 3: Cross multiply
    30,936.26x = 42,709.80 × 21,517.58
  4. Step 4: Simplify right side
    30,936.26x = 919,011,538.28
  5. Step 5: Solve for x
    x = 919,011,538.28/30,936.26
  6. Step 6: Final answer
    x = 29,706.61

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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.