Home / 21,063,136.80-31,594,705.20-19,420,845.60

Finding the Fourth Proportional to 21,063,136.80, 31,594,705.20 and 19,420,845.60

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Solution

The fourth proportional to 21,063,136.80, 31,594,705.20 and 19,420,845.60 is: 29,131,268.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063,136.80 : 31,594,705.20 = 19,420,845.60 : x
  2. Step 2: Convert to fraction form
    21,063,136.80/31,594,705.20 = 19,420,845.60/x
  3. Step 3: Cross multiply
    21,063,136.80x = 31,594,705.20 × 19,420,845.60
  4. Step 4: Simplify right side
    21,063,136.80x = 613,595,891,466,717.12
  5. Step 5: Solve for x
    x = 613,595,891,466,717.12/21,063,136.80
  6. Step 6: Final answer
    x = 29,131,268.40

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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.