Home / 21,278,312.70-31,917,469.05-7,813,391.10

Finding the Fourth Proportional to 21,278,312.70, 31,917,469.05 and 7,813,391.10

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Solution

The fourth proportional to 21,278,312.70, 31,917,469.05 and 7,813,391.10 is: 11,720,086.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278,312.70 : 31,917,469.05 = 7,813,391.10 : x
  2. Step 2: Convert to fraction form
    21,278,312.70/31,917,469.05 = 7,813,391.10/x
  3. Step 3: Cross multiply
    21,278,312.70x = 31,917,469.05 × 7,813,391.10
  4. Step 4: Simplify right side
    21,278,312.70x = 249,383,668,609,795.44
  5. Step 5: Solve for x
    x = 249,383,668,609,795.44/21,278,312.70
  6. Step 6: Final answer
    x = 11,720,086.65

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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.