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Finding the Fourth Proportional to 12,671,990.60, 19,007,985.90 and 12,671,990.60

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Solution

The fourth proportional to 12,671,990.60, 19,007,985.90 and 12,671,990.60 is: 19,007,985.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671,990.60 : 19,007,985.90 = 12,671,990.60 : x
  2. Step 2: Convert to fraction form
    12,671,990.60/19,007,985.90 = 12,671,990.60/x
  3. Step 3: Cross multiply
    12,671,990.60x = 19,007,985.90 × 12,671,990.60
  4. Step 4: Simplify right side
    12,671,990.60x = 240,869,018,649,732.50
  5. Step 5: Solve for x
    x = 240,869,018,649,732.50/12,671,990.60
  6. Step 6: Final answer
    x = 19,007,985.90

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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.