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Finding the Fourth Proportional to 12,520,879.80, 18,781,319.70 and 12,352,918.20

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Solution

The fourth proportional to 12,520,879.80, 18,781,319.70 and 12,352,918.20 is: 18,529,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520,879.80 : 18,781,319.70 = 12,352,918.20 : x
  2. Step 2: Convert to fraction form
    12,520,879.80/18,781,319.70 = 12,352,918.20/x
  3. Step 3: Cross multiply
    12,520,879.80x = 18,781,319.70 × 12,352,918.20
  4. Step 4: Simplify right side
    12,520,879.80x = 232,004,105,942,148.53
  5. Step 5: Solve for x
    x = 232,004,105,942,148.53/12,520,879.80
  6. Step 6: Final answer
    x = 18,529,377.30

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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.