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Finding the Fourth Proportional to 20,799,791.83, 28,703,499.90 and 11,507,428.40

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Solution

The fourth proportional to 20,799,791.83, 28,703,499.90 and 11,507,428.40 is: 15,880,133.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799,791.83 : 28,703,499.90 = 11,507,428.40 : x
  2. Step 2: Convert to fraction form
    20,799,791.83/28,703,499.90 = 11,507,428.40/x
  3. Step 3: Cross multiply
    20,799,791.83x = 28,703,499.90 × 11,507,428.40
  4. Step 4: Simplify right side
    20,799,791.83x = 330,303,469,855,088.62
  5. Step 5: Solve for x
    x = 330,303,469,855,088.62/20,799,791.83
  6. Step 6: Final answer
    x = 15,880,133.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.