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Finding the Fourth Proportional to 21,879.14, 32,817.11 and 8,549.63

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Solution

The fourth proportional to 21,879.14, 32,817.11 and 8,549.63 is: 12,823.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.14 : 32,817.11 = 8,549.63 : x
  2. Step 2: Convert to fraction form
    21,879.14/32,817.11 = 8,549.63/x
  3. Step 3: Cross multiply
    21,879.14x = 32,817.11 × 8,549.63
  4. Step 4: Simplify right side
    21,879.14x = 280,573,984.08
  5. Step 5: Solve for x
    x = 280,573,984.08/21,879.14
  6. Step 6: Final answer
    x = 12,823.82

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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.