Home / 21,307,729.44-31,972,091.76-13,218,628.80

Finding the Fourth Proportional to 21,307,729.44, 31,972,091.76 and 13,218,628.80

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Solution

The fourth proportional to 21,307,729.44, 31,972,091.76 and 13,218,628.80 is: 19,834,455.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307,729.44 : 31,972,091.76 = 13,218,628.80 : x
  2. Step 2: Convert to fraction form
    21,307,729.44/31,972,091.76 = 13,218,628.80/x
  3. Step 3: Cross multiply
    21,307,729.44x = 31,972,091.76 × 13,218,628.80
  4. Step 4: Simplify right side
    21,307,729.44x = 422,627,212,934,978.75
  5. Step 5: Solve for x
    x = 422,627,212,934,978.75/21,307,729.44
  6. Step 6: Final answer
    x = 19,834,455.57

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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.