Home / 21,002,820.80-31,504,231.20-20,870,110.40

Finding the Fourth Proportional to 21,002,820.80, 31,504,231.20 and 20,870,110.40

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Solution

The fourth proportional to 21,002,820.80, 31,504,231.20 and 20,870,110.40 is: 31,305,165.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,820.80 : 31,504,231.20 = 20,870,110.40 : x
  2. Step 2: Convert to fraction form
    21,002,820.80/31,504,231.20 = 20,870,110.40/x
  3. Step 3: Cross multiply
    21,002,820.80x = 31,504,231.20 × 20,870,110.40
  4. Step 4: Simplify right side
    21,002,820.80x = 657,496,783,211,124.38
  5. Step 5: Solve for x
    x = 657,496,783,211,124.38/21,002,820.80
  6. Step 6: Final answer
    x = 31,305,165.60

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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.