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Finding the Fourth Proportional to 21,955.73, 32,939.75 and 8,817.32

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Solution

The fourth proportional to 21,955.73, 32,939.75 and 8,817.32 is: 13,228.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.73 : 32,939.75 = 8,817.32 : x
  2. Step 2: Convert to fraction form
    21,955.73/32,939.75 = 8,817.32/x
  3. Step 3: Cross multiply
    21,955.73x = 32,939.75 × 8,817.32
  4. Step 4: Simplify right side
    21,955.73x = 290,440,107.68
  5. Step 5: Solve for x
    x = 290,440,107.68/21,955.73
  6. Step 6: Final answer
    x = 13,228.45

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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.