Home / 31,451,721.72-43,416,768.06-21,144,423.48

Finding the Fourth Proportional to 31,451,721.72, 43,416,768.06 and 21,144,423.48

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Solution

The fourth proportional to 31,451,721.72, 43,416,768.06 and 21,144,423.48 is: 29,188,307.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,451,721.72 : 43,416,768.06 = 21,144,423.48 : x
  2. Step 2: Convert to fraction form
    31,451,721.72/43,416,768.06 = 21,144,423.48/x
  3. Step 3: Cross multiply
    31,451,721.72x = 43,416,768.06 × 21,144,423.48
  4. Step 4: Simplify right side
    31,451,721.72x = 918,022,529,993,578.12
  5. Step 5: Solve for x
    x = 918,022,529,993,578.12/31,451,721.72
  6. Step 6: Final answer
    x = 29,188,307.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.