Home / 21,308,164.20-31,964,579.10-20,636,317.80

Finding the Fourth Proportional to 21,308,164.20, 31,964,579.10 and 20,636,317.80

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Solution

The fourth proportional to 21,308,164.20, 31,964,579.10 and 20,636,317.80 is: 30,956,735.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308,164.20 : 31,964,579.10 = 20,636,317.80 : x
  2. Step 2: Convert to fraction form
    21,308,164.20/31,964,579.10 = 20,636,317.80/x
  3. Step 3: Cross multiply
    21,308,164.20x = 31,964,579.10 × 20,636,317.80
  4. Step 4: Simplify right side
    21,308,164.20x = 659,631,212,650,838
  5. Step 5: Solve for x
    x = 659,631,212,650,838/21,308,164.20
  6. Step 6: Final answer
    x = 30,956,735.95

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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.