Home / 21,519,586,629.79-29,707,781,005.21-13,384,012,365.88

Finding the Fourth Proportional to 21,519,586,629.79, 29,707,781,005.21 and 13,384,012,365.88

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Solution

The fourth proportional to 21,519,586,629.79, 29,707,781,005.21 and 13,384,012,365.88 is: 18,476,623,885.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,519,586,629.79 : 29,707,781,005.21 = 13,384,012,365.88 : x
  2. Step 2: Convert to fraction form
    21,519,586,629.79/29,707,781,005.21 = 13,384,012,365.88/x
  3. Step 3: Cross multiply
    21,519,586,629.79x = 29,707,781,005.21 × 13,384,012,365.88
  4. Step 4: Simplify right side
    21,519,586,629.79x = 397,609,308,336,542,515,200
  5. Step 5: Solve for x
    x = 397,609,308,336,542,515,200/21,519,586,629.79
  6. Step 6: Final answer
    x = 18,476,623,885.81

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1.5x scale

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.