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Finding the Fourth Proportional to 21,292.56, 31,942.59 and 8,805.59

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Solution

The fourth proportional to 21,292.56, 31,942.59 and 8,805.59 is: 13,209.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,292.56 : 31,942.59 = 8,805.59 : x
  2. Step 2: Convert to fraction form
    21,292.56/31,942.59 = 8,805.59/x
  3. Step 3: Cross multiply
    21,292.56x = 31,942.59 × 8,805.59
  4. Step 4: Simplify right side
    21,292.56x = 281,273,191.37
  5. Step 5: Solve for x
    x = 281,273,191.37/21,292.56
  6. Step 6: Final answer
    x = 13,209.93

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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.