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Finding the Fourth Proportional to 18,809,934.30, 28,214,901.45 and 9,243,996.30

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Solution

The fourth proportional to 18,809,934.30, 28,214,901.45 and 9,243,996.30 is: 13,865,994.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809,934.30 : 28,214,901.45 = 9,243,996.30 : x
  2. Step 2: Convert to fraction form
    18,809,934.30/28,214,901.45 = 9,243,996.30/x
  3. Step 3: Cross multiply
    18,809,934.30x = 28,214,901.45 × 9,243,996.30
  4. Step 4: Simplify right side
    18,809,934.30x = 260,818,444,608,664.66
  5. Step 5: Solve for x
    x = 260,818,444,608,664.66/18,809,934.30
  6. Step 6: Final answer
    x = 13,865,994.45

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Double scale
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Similar ratio
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1.5x scale

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.