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Finding the Fourth Proportional to 13,608,436.19, 20,405,567.03 and 6,418,039.46

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Solution

The fourth proportional to 13,608,436.19, 20,405,567.03 and 6,418,039.46 is: 9,623,716.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,436.19 : 20,405,567.03 = 6,418,039.46 : x
  2. Step 2: Convert to fraction form
    13,608,436.19/20,405,567.03 = 6,418,039.46/x
  3. Step 3: Cross multiply
    13,608,436.19x = 20,405,567.03 × 6,418,039.46
  4. Step 4: Simplify right side
    13,608,436.19x = 130,963,734,304,204.86
  5. Step 5: Solve for x
    x = 130,963,734,304,204.86/13,608,436.19
  6. Step 6: Final answer
    x = 9,623,716.68

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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.