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Finding the Fourth Proportional to 12,591,611.80, 18,887,417.70 and 9,851,738.20

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Solution

The fourth proportional to 12,591,611.80, 18,887,417.70 and 9,851,738.20 is: 14,777,607.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591,611.80 : 18,887,417.70 = 9,851,738.20 : x
  2. Step 2: Convert to fraction form
    12,591,611.80/18,887,417.70 = 9,851,738.20/x
  3. Step 3: Cross multiply
    12,591,611.80x = 18,887,417.70 × 9,851,738.20
  4. Step 4: Simplify right side
    12,591,611.80x = 186,073,894,454,446.12
  5. Step 5: Solve for x
    x = 186,073,894,454,446.12/12,591,611.80
  6. Step 6: Final answer
    x = 14,777,607.30

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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.