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Finding the Fourth Proportional to 18,698,866.40, 28,040,005.20 and 8,596,287.20

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Solution

The fourth proportional to 18,698,866.40, 28,040,005.20 and 8,596,287.20 is: 12,890,617.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698,866.40 : 28,040,005.20 = 8,596,287.20 : x
  2. Step 2: Convert to fraction form
    18,698,866.40/28,040,005.20 = 8,596,287.20/x
  3. Step 3: Cross multiply
    18,698,866.40x = 28,040,005.20 × 8,596,287.20
  4. Step 4: Simplify right side
    18,698,866.40x = 241,039,937,788,693.41
  5. Step 5: Solve for x
    x = 241,039,937,788,693.41/18,698,866.40
  6. Step 6: Final answer
    x = 12,890,617.68

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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.