Home / 21,131,145.42-29,145,888.63-19,394,448.72

Finding the Fourth Proportional to 21,131,145.42, 29,145,888.63 and 19,394,448.72

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Solution

The fourth proportional to 21,131,145.42, 29,145,888.63 and 19,394,448.72 is: 26,750,487.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131,145.42 : 29,145,888.63 = 19,394,448.72 : x
  2. Step 2: Convert to fraction form
    21,131,145.42/29,145,888.63 = 19,394,448.72/x
  3. Step 3: Cross multiply
    21,131,145.42x = 29,145,888.63 × 19,394,448.72
  4. Step 4: Simplify right side
    21,131,145.42x = 565,268,442,433,366
  5. Step 5: Solve for x
    x = 565,268,442,433,366/21,131,145.42
  6. Step 6: Final answer
    x = 26,750,487.55

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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.