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Finding the Fourth Proportional to 21,970.89, 32,952.89 and 7,928.73

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Solution

The fourth proportional to 21,970.89, 32,952.89 and 7,928.73 is: 11,891.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.89 : 32,952.89 = 7,928.73 : x
  2. Step 2: Convert to fraction form
    21,970.89/32,952.89 = 7,928.73/x
  3. Step 3: Cross multiply
    21,970.89x = 32,952.89 × 7,928.73
  4. Step 4: Simplify right side
    21,970.89x = 261,274,587.35
  5. Step 5: Solve for x
    x = 261,274,587.35/21,970.89
  6. Step 6: Final answer
    x = 11,891.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.