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Finding the Fourth Proportional to 18,713,404.80, 28,014,994.80 and 13,942,245.60

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Solution

The fourth proportional to 18,713,404.80, 28,014,994.80 and 13,942,245.60 is: 20,872,307.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713,404.80 : 28,014,994.80 = 13,942,245.60 : x
  2. Step 2: Convert to fraction form
    18,713,404.80/28,014,994.80 = 13,942,245.60/x
  3. Step 3: Cross multiply
    18,713,404.80x = 28,014,994.80 × 13,942,245.60
  4. Step 4: Simplify right side
    18,713,404.80x = 390,591,937,984,322.88
  5. Step 5: Solve for x
    x = 390,591,937,984,322.88/18,713,404.80
  6. Step 6: Final answer
    x = 20,872,307.43

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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.