Home / 21,131,137.20-31,696,705.80-7,666,215.60

Finding the Fourth Proportional to 21,131,137.20, 31,696,705.80 and 7,666,215.60

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Solution

The fourth proportional to 21,131,137.20, 31,696,705.80 and 7,666,215.60 is: 11,499,323.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131,137.20 : 31,696,705.80 = 7,666,215.60 : x
  2. Step 2: Convert to fraction form
    21,131,137.20/31,696,705.80 = 7,666,215.60/x
  3. Step 3: Cross multiply
    21,131,137.20x = 31,696,705.80 × 7,666,215.60
  4. Step 4: Simplify right side
    21,131,137.20x = 242,993,780,472,570.47
  5. Step 5: Solve for x
    x = 242,993,780,472,570.47/21,131,137.20
  6. Step 6: Final answer
    x = 11,499,323.40

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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.