Home / 21,303,008.40-31,954,512.60-13,189,675.80

Finding the Fourth Proportional to 21,303,008.40, 31,954,512.60 and 13,189,675.80

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Solution

The fourth proportional to 21,303,008.40, 31,954,512.60 and 13,189,675.80 is: 19,784,513.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303,008.40 : 31,954,512.60 = 13,189,675.80 : x
  2. Step 2: Convert to fraction form
    21,303,008.40/31,954,512.60 = 13,189,675.80/x
  3. Step 3: Cross multiply
    21,303,008.40x = 31,954,512.60 × 13,189,675.80
  4. Step 4: Simplify right side
    21,303,008.40x = 421,469,661,541,015.12
  5. Step 5: Solve for x
    x = 421,469,661,541,015.12/21,303,008.40
  6. Step 6: Final answer
    x = 19,784,513.70

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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.