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Finding the Fourth Proportional to 21,282.06, 31,923.02 and 21,251.28

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Solution

The fourth proportional to 21,282.06, 31,923.02 and 21,251.28 is: 31,876.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282.06 : 31,923.02 = 21,251.28 : x
  2. Step 2: Convert to fraction form
    21,282.06/31,923.02 = 21,251.28/x
  3. Step 3: Cross multiply
    21,282.06x = 31,923.02 × 21,251.28
  4. Step 4: Simplify right side
    21,282.06x = 678,404,770.59
  5. Step 5: Solve for x
    x = 678,404,770.59/21,282.06
  6. Step 6: Final answer
    x = 31,876.85

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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.