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Finding the Fourth Proportional to 20,611,206.80, 30,916,810.20 and 20,138,814.80

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Solution

The fourth proportional to 20,611,206.80, 30,916,810.20 and 20,138,814.80 is: 30,208,222.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611,206.80 : 30,916,810.20 = 20,138,814.80 : x
  2. Step 2: Convert to fraction form
    20,611,206.80/30,916,810.20 = 20,138,814.80/x
  3. Step 3: Cross multiply
    20,611,206.80x = 30,916,810.20 × 20,138,814.80
  4. Step 4: Simplify right side
    20,611,206.80x = 622,627,914,824,551
  5. Step 5: Solve for x
    x = 622,627,914,824,551/20,611,206.80
  6. Step 6: Final answer
    x = 30,208,222.20

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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.