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Finding the Fourth Proportional to 18,859,822.64, 28,289,526.60 and 11,288,901.68

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Solution

The fourth proportional to 18,859,822.64, 28,289,526.60 and 11,288,901.68 is: 16,933,228.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859,822.64 : 28,289,526.60 = 11,288,901.68 : x
  2. Step 2: Convert to fraction form
    18,859,822.64/28,289,526.60 = 11,288,901.68/x
  3. Step 3: Cross multiply
    18,859,822.64x = 28,289,526.60 × 11,288,901.68
  4. Step 4: Simplify right side
    18,859,822.64x = 319,357,684,361,144.69
  5. Step 5: Solve for x
    x = 319,357,684,361,144.69/18,859,822.64
  6. Step 6: Final answer
    x = 16,933,228.40

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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.