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Finding the Fourth Proportional to 13,872,772.80, 20,809,159.20 and 13,872,772.80

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Solution

The fourth proportional to 13,872,772.80, 20,809,159.20 and 13,872,772.80 is: 20,809,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,872,772.80 : 20,809,159.20 = 13,872,772.80 : x
  2. Step 2: Convert to fraction form
    13,872,772.80/20,809,159.20 = 13,872,772.80/x
  3. Step 3: Cross multiply
    13,872,772.80x = 20,809,159.20 × 13,872,772.80
  4. Step 4: Simplify right side
    13,872,772.80x = 288,680,737,740,629.75
  5. Step 5: Solve for x
    x = 288,680,737,740,629.75/13,872,772.80
  6. Step 6: Final answer
    x = 20,809,159.20

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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.