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Finding the Fourth Proportional to 21,941.80, 32,911.96 and 8,790.64

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Solution

The fourth proportional to 21,941.80, 32,911.96 and 8,790.64 is: 13,185.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,941.80 : 32,911.96 = 8,790.64 : x
  2. Step 2: Convert to fraction form
    21,941.80/32,911.96 = 8,790.64/x
  3. Step 3: Cross multiply
    21,941.80x = 32,911.96 × 8,790.64
  4. Step 4: Simplify right side
    21,941.80x = 289,317,192.05
  5. Step 5: Solve for x
    x = 289,317,192.05/21,941.80
  6. Step 6: Final answer
    x = 13,185.66

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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.