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Finding the Fourth Proportional to 18,806,421.60, 28,209,632.40 and 17,672,680.80

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Solution

The fourth proportional to 18,806,421.60, 28,209,632.40 and 17,672,680.80 is: 26,509,021.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806,421.60 : 28,209,632.40 = 17,672,680.80 : x
  2. Step 2: Convert to fraction form
    18,806,421.60/28,209,632.40 = 17,672,680.80/x
  3. Step 3: Cross multiply
    18,806,421.60x = 28,209,632.40 × 17,672,680.80
  4. Step 4: Simplify right side
    18,806,421.60x = 498,539,828,890,537.94
  5. Step 5: Solve for x
    x = 498,539,828,890,537.94/18,806,421.60
  6. Step 6: Final answer
    x = 26,509,021.20

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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.