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Finding the Fourth Proportional to 20,799,791.95, 28,703,500.07 and 11,507,428.52

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Solution

The fourth proportional to 20,799,791.95, 28,703,500.07 and 11,507,428.52 is: 15,880,133.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799,791.95 : 28,703,500.07 = 11,507,428.52 : x
  2. Step 2: Convert to fraction form
    20,799,791.95/28,703,500.07 = 11,507,428.52/x
  3. Step 3: Cross multiply
    20,799,791.95x = 28,703,500.07 × 11,507,428.52
  4. Step 4: Simplify right side
    20,799,791.95x = 330,303,475,415,483.06
  5. Step 5: Solve for x
    x = 330,303,475,415,483.06/20,799,791.95
  6. Step 6: Final answer
    x = 15,880,133.62

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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.