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Finding the Fourth Proportional to 21,241.73, 31,866.42 and 8,754.93

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Solution

The fourth proportional to 21,241.73, 31,866.42 and 8,754.93 is: 13,133.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,241.73 : 31,866.42 = 8,754.93 : x
  2. Step 2: Convert to fraction form
    21,241.73/31,866.42 = 8,754.93/x
  3. Step 3: Cross multiply
    21,241.73x = 31,866.42 × 8,754.93
  4. Step 4: Simplify right side
    21,241.73x = 278,988,276.45
  5. Step 5: Solve for x
    x = 278,988,276.45/21,241.73
  6. Step 6: Final answer
    x = 13,133.97

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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.