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Finding the Fourth Proportional to 13,784,978.80, 20,677,468.20 and 8,683,145.20

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Solution

The fourth proportional to 13,784,978.80, 20,677,468.20 and 8,683,145.20 is: 13,024,717.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,784,978.80 : 20,677,468.20 = 8,683,145.20 : x
  2. Step 2: Convert to fraction form
    13,784,978.80/20,677,468.20 = 8,683,145.20/x
  3. Step 3: Cross multiply
    13,784,978.80x = 20,677,468.20 × 8,683,145.20
  4. Step 4: Simplify right side
    13,784,978.80x = 179,545,458,748,982.62
  5. Step 5: Solve for x
    x = 179,545,458,748,982.62/13,784,978.80
  6. Step 6: Final answer
    x = 13,024,717.80

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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.