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Finding the Fourth Proportional to 18,705,803.80, 28,058,705.70 and 15,965,930.20

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Solution

The fourth proportional to 18,705,803.80, 28,058,705.70 and 15,965,930.20 is: 23,948,895.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705,803.80 : 28,058,705.70 = 15,965,930.20 : x
  2. Step 2: Convert to fraction form
    18,705,803.80/28,058,705.70 = 15,965,930.20/x
  3. Step 3: Cross multiply
    18,705,803.80x = 28,058,705.70 × 15,965,930.20
  4. Step 4: Simplify right side
    18,705,803.80x = 447,983,336,708,542.12
  5. Step 5: Solve for x
    x = 447,983,336,708,542.12/18,705,803.80
  6. Step 6: Final answer
    x = 23,948,895.30

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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.