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Finding the Fourth Proportional to 27,957.56, 38,584.15 and 20,871.68

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Solution

The fourth proportional to 27,957.56, 38,584.15 and 20,871.68 is: 28,804.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,957.56 : 38,584.15 = 20,871.68 : x
  2. Step 2: Convert to fraction form
    27,957.56/38,584.15 = 20,871.68/x
  3. Step 3: Cross multiply
    27,957.56x = 38,584.15 × 20,871.68
  4. Step 4: Simplify right side
    27,957.56x = 805,315,786.77
  5. Step 5: Solve for x
    x = 805,315,786.77/27,957.56
  6. Step 6: Final answer
    x = 28,804.94

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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.