Home / 21,263,568.80-31,918,972.80-13,185,665.60

Finding the Fourth Proportional to 21,263,568.80, 31,918,972.80 and 13,185,665.60

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Solution

The fourth proportional to 21,263,568.80, 31,918,972.80 and 13,185,665.60 is: 19,793,145.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,263,568.80 : 31,918,972.80 = 13,185,665.60 : x
  2. Step 2: Convert to fraction form
    21,263,568.80/31,918,972.80 = 13,185,665.60/x
  3. Step 3: Cross multiply
    21,263,568.80x = 31,918,972.80 × 13,185,665.60
  4. Step 4: Simplify right side
    21,263,568.80x = 420,872,901,636,295.69
  5. Step 5: Solve for x
    x = 420,872,901,636,295.69/21,263,568.80
  6. Step 6: Final answer
    x = 19,793,145.05

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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.