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Finding the Fourth Proportional to 12,798,109.80, 19,197,164.70 and 12,443,815.80

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Solution

The fourth proportional to 12,798,109.80, 19,197,164.70 and 12,443,815.80 is: 18,665,723.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,798,109.80 : 19,197,164.70 = 12,443,815.80 : x
  2. Step 2: Convert to fraction form
    12,798,109.80/19,197,164.70 = 12,443,815.80/x
  3. Step 3: Cross multiply
    12,798,109.80x = 19,197,164.70 × 12,443,815.80
  4. Step 4: Simplify right side
    12,798,109.80x = 238,885,981,409,062.25
  5. Step 5: Solve for x
    x = 238,885,981,409,062.25/12,798,109.80
  6. Step 6: Final answer
    x = 18,665,723.70

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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.