Home / 21,308,123.20-31,964,517.60-20,636,276.80

Finding the Fourth Proportional to 21,308,123.20, 31,964,517.60 and 20,636,276.80

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Solution

The fourth proportional to 21,308,123.20, 31,964,517.60 and 20,636,276.80 is: 30,956,674.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308,123.20 : 31,964,517.60 = 20,636,276.80 : x
  2. Step 2: Convert to fraction form
    21,308,123.20/31,964,517.60 = 20,636,276.80/x
  3. Step 3: Cross multiply
    21,308,123.20x = 31,964,517.60 × 20,636,276.80
  4. Step 4: Simplify right side
    21,308,123.20x = 659,628,632,972,071.75
  5. Step 5: Solve for x
    x = 659,628,632,972,071.75/21,308,123.20
  6. Step 6: Final answer
    x = 30,956,674.45

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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.