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Finding the Fourth Proportional to 20,706.88, 30,909.96 and 19,164.96

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Solution

The fourth proportional to 20,706.88, 30,909.96 and 19,164.96 is: 28,608.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.88 : 30,909.96 = 19,164.96 : x
  2. Step 2: Convert to fraction form
    20,706.88/30,909.96 = 19,164.96/x
  3. Step 3: Cross multiply
    20,706.88x = 30,909.96 × 19,164.96
  4. Step 4: Simplify right side
    20,706.88x = 592,388,147.00
  5. Step 5: Solve for x
    x = 592,388,147.00/20,706.88
  6. Step 6: Final answer
    x = 28,608.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.