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Finding the Fourth Proportional to 15,922.26, 21,972.86 and 9,957.39

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Solution

The fourth proportional to 15,922.26, 21,972.86 and 9,957.39 is: 13,741.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,922.26 : 21,972.86 = 9,957.39 : x
  2. Step 2: Convert to fraction form
    15,922.26/21,972.86 = 9,957.39/x
  3. Step 3: Cross multiply
    15,922.26x = 21,972.86 × 9,957.39
  4. Step 4: Simplify right side
    15,922.26x = 218,792,286.65
  5. Step 5: Solve for x
    x = 218,792,286.65/15,922.26
  6. Step 6: Final answer
    x = 13,741.28

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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.