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Finding the Fourth Proportional to 21,950.80, 32,861.94 and 13,605.64

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Solution

The fourth proportional to 21,950.80, 32,861.94 and 13,605.64 is: 20,368.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,950.80 : 32,861.94 = 13,605.64 : x
  2. Step 2: Convert to fraction form
    21,950.80/32,861.94 = 13,605.64/x
  3. Step 3: Cross multiply
    21,950.80x = 32,861.94 × 13,605.64
  4. Step 4: Simplify right side
    21,950.80x = 447,107,592.17
  5. Step 5: Solve for x
    x = 447,107,592.17/21,950.80
  6. Step 6: Final answer
    x = 20,368.63

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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.