Home / 31,401,905.40-47,054,781.90-21,128,713.38

Finding the Fourth Proportional to 31,401,905.40, 47,054,781.90 and 21,128,713.38

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Solution

The fourth proportional to 31,401,905.40, 47,054,781.90 and 21,128,713.38 is: 31,660,722.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,401,905.40 : 47,054,781.90 = 21,128,713.38 : x
  2. Step 2: Convert to fraction form
    31,401,905.40/47,054,781.90 = 21,128,713.38/x
  3. Step 3: Cross multiply
    31,401,905.40x = 47,054,781.90 × 21,128,713.38
  4. Step 4: Simplify right side
    31,401,905.40x = 994,206,999,923,511.75
  5. Step 5: Solve for x
    x = 994,206,999,923,511.75/31,401,905.40
  6. Step 6: Final answer
    x = 31,660,722.09

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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.