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Finding the Fourth Proportional to 20,706.50, 28,573.50 and 11,754.18

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Solution

The fourth proportional to 20,706.50, 28,573.50 and 11,754.18 is: 16,219.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.50 : 28,573.50 = 11,754.18 : x
  2. Step 2: Convert to fraction form
    20,706.50/28,573.50 = 11,754.18/x
  3. Step 3: Cross multiply
    20,706.50x = 28,573.50 × 11,754.18
  4. Step 4: Simplify right side
    20,706.50x = 335,858,062.23
  5. Step 5: Solve for x
    x = 335,858,062.23/20,706.50
  6. Step 6: Final answer
    x = 16,219.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.