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Finding the Fourth Proportional to 21,819.42, 32,728.91 and 9,328.82

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Solution

The fourth proportional to 21,819.42, 32,728.91 and 9,328.82 is: 13,993.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,819.42 : 32,728.91 = 9,328.82 : x
  2. Step 2: Convert to fraction form
    21,819.42/32,728.91 = 9,328.82/x
  3. Step 3: Cross multiply
    21,819.42x = 32,728.91 × 9,328.82
  4. Step 4: Simplify right side
    21,819.42x = 305,321,899.90
  5. Step 5: Solve for x
    x = 305,321,899.90/21,819.42
  6. Step 6: Final answer
    x = 13,993.13

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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.