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Finding the Fourth Proportional to 18,683,859.60, 28,025,789.40 and 10,074,515.40

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Solution

The fourth proportional to 18,683,859.60, 28,025,789.40 and 10,074,515.40 is: 15,111,773.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683,859.60 : 28,025,789.40 = 10,074,515.40 : x
  2. Step 2: Convert to fraction form
    18,683,859.60/28,025,789.40 = 10,074,515.40/x
  3. Step 3: Cross multiply
    18,683,859.60x = 28,025,789.40 × 10,074,515.40
  4. Step 4: Simplify right side
    18,683,859.60x = 282,346,246,907,456.75
  5. Step 5: Solve for x
    x = 282,346,246,907,456.75/18,683,859.60
  6. Step 6: Final answer
    x = 15,111,773.10

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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.