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Finding the Fourth Proportional to 12,497,611.20, 18,746,416.80 and 3,978,808.80

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Solution

The fourth proportional to 12,497,611.20, 18,746,416.80 and 3,978,808.80 is: 5,968,213.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,497,611.20 : 18,746,416.80 = 3,978,808.80 : x
  2. Step 2: Convert to fraction form
    12,497,611.20/18,746,416.80 = 3,978,808.80/x
  3. Step 3: Cross multiply
    12,497,611.20x = 18,746,416.80 × 3,978,808.80
  4. Step 4: Simplify right side
    12,497,611.20x = 74,588,408,132,307.84
  5. Step 5: Solve for x
    x = 74,588,408,132,307.84/12,497,611.20
  6. Step 6: Final answer
    x = 5,968,213.20

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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.