Home / 18,721,839.60-28,061,764.20-9,620,420.40

Finding the Fourth Proportional to 18,721,839.60, 28,061,764.20 and 9,620,420.40

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Solution

The fourth proportional to 18,721,839.60, 28,061,764.20 and 9,620,420.40 is: 14,419,841.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,839.60 : 28,061,764.20 = 9,620,420.40 : x
  2. Step 2: Convert to fraction form
    18,721,839.60/28,061,764.20 = 9,620,420.40/x
  3. Step 3: Cross multiply
    18,721,839.60x = 28,061,764.20 × 9,620,420.40
  4. Step 4: Simplify right side
    18,721,839.60x = 269,965,968,769,669.69
  5. Step 5: Solve for x
    x = 269,965,968,769,669.69/18,721,839.60
  6. Step 6: Final answer
    x = 14,419,841.99

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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.