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Finding the Fourth Proportional to 21,241.76, 31,866.48 and 8,754.84

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Solution

The fourth proportional to 21,241.76, 31,866.48 and 8,754.84 is: 13,133.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,241.76 : 31,866.48 = 8,754.84 : x
  2. Step 2: Convert to fraction form
    21,241.76/31,866.48 = 8,754.84/x
  3. Step 3: Cross multiply
    21,241.76x = 31,866.48 × 8,754.84
  4. Step 4: Simplify right side
    21,241.76x = 278,985,933.76
  5. Step 5: Solve for x
    x = 278,985,933.76/21,241.76
  6. Step 6: Final answer
    x = 13,133.85

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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.