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Finding the Fourth Proportional to 19,992,551.70, 29,988,827.55 and 12,434,279.70

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Solution

The fourth proportional to 19,992,551.70, 29,988,827.55 and 12,434,279.70 is: 18,651,419.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992,551.70 : 29,988,827.55 = 12,434,279.70 : x
  2. Step 2: Convert to fraction form
    19,992,551.70/29,988,827.55 = 12,434,279.70/x
  3. Step 3: Cross multiply
    19,992,551.70x = 29,988,827.55 × 12,434,279.70
  4. Step 4: Simplify right side
    19,992,551.70x = 372,889,469,631,765.75
  5. Step 5: Solve for x
    x = 372,889,469,631,765.75/19,992,551.70
  6. Step 6: Final answer
    x = 18,651,419.55

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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.