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Finding the Fourth Proportional to 21,955.85, 32,939.93 and 8,817.44

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Solution

The fourth proportional to 21,955.85, 32,939.93 and 8,817.44 is: 13,228.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.85 : 32,939.93 = 8,817.44 : x
  2. Step 2: Convert to fraction form
    21,955.85/32,939.93 = 8,817.44/x
  3. Step 3: Cross multiply
    21,955.85x = 32,939.93 × 8,817.44
  4. Step 4: Simplify right side
    21,955.85x = 290,445,856.38
  5. Step 5: Solve for x
    x = 290,445,856.38/21,955.85
  6. Step 6: Final answer
    x = 13,228.63

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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.