Home / 21,131,142.20-31,696,713.30-7,666,220.60

Finding the Fourth Proportional to 21,131,142.20, 31,696,713.30 and 7,666,220.60

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Solution

The fourth proportional to 21,131,142.20, 31,696,713.30 and 7,666,220.60 is: 11,499,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131,142.20 : 31,696,713.30 = 7,666,220.60 : x
  2. Step 2: Convert to fraction form
    21,131,142.20/31,696,713.30 = 7,666,220.60/x
  3. Step 3: Cross multiply
    21,131,142.20x = 31,696,713.30 × 7,666,220.60
  4. Step 4: Simplify right side
    21,131,142.20x = 242,993,996,452,753.97
  5. Step 5: Solve for x
    x = 242,993,996,452,753.97/21,131,142.20
  6. Step 6: Final answer
    x = 11,499,330.90

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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.