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Finding the Fourth Proportional to 19,998,751.84, 29,991,936.48 and 7,217,638.72

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Solution

The fourth proportional to 19,998,751.84, 29,991,936.48 and 7,217,638.72 is: 10,824,223.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,998,751.84 : 29,991,936.48 = 7,217,638.72 : x
  2. Step 2: Convert to fraction form
    19,998,751.84/29,991,936.48 = 7,217,638.72/x
  3. Step 3: Cross multiply
    19,998,751.84x = 29,991,936.48 × 7,217,638.72
  4. Step 4: Simplify right side
    19,998,751.84x = 216,470,962,025,828.50
  5. Step 5: Solve for x
    x = 216,470,962,025,828.50/19,998,751.84
  6. Step 6: Final answer
    x = 10,824,223.62

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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.