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Finding the Fourth Proportional to 18,679,530.10, 28,019,295.15 and 12,296,989.30

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Solution

The fourth proportional to 18,679,530.10, 28,019,295.15 and 12,296,989.30 is: 18,445,483.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679,530.10 : 28,019,295.15 = 12,296,989.30 : x
  2. Step 2: Convert to fraction form
    18,679,530.10/28,019,295.15 = 12,296,989.30/x
  3. Step 3: Cross multiply
    18,679,530.10x = 28,019,295.15 × 12,296,989.30
  4. Step 4: Simplify right side
    18,679,530.10x = 344,552,972,653,091.88
  5. Step 5: Solve for x
    x = 344,552,972,653,091.88/18,679,530.10
  6. Step 6: Final answer
    x = 18,445,483.95

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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.