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Finding the Fourth Proportional to 18,888,694.80, 28,291,051.80 and 14,615,005.20

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Solution

The fourth proportional to 18,888,694.80, 28,291,051.80 and 14,615,005.20 is: 21,890,018.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888,694.80 : 28,291,051.80 = 14,615,005.20 : x
  2. Step 2: Convert to fraction form
    18,888,694.80/28,291,051.80 = 14,615,005.20/x
  3. Step 3: Cross multiply
    18,888,694.80x = 28,291,051.80 × 14,615,005.20
  4. Step 4: Simplify right side
    18,888,694.80x = 413,473,869,170,469.38
  5. Step 5: Solve for x
    x = 413,473,869,170,469.38/18,888,694.80
  6. Step 6: Final answer
    x = 21,890,018.00

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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.