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Finding the Fourth Proportional to 18,781,971.60, 28,172,957.40 and 18,781,971.60

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Solution

The fourth proportional to 18,781,971.60, 28,172,957.40 and 18,781,971.60 is: 28,172,957.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781,971.60 : 28,172,957.40 = 18,781,971.60 : x
  2. Step 2: Convert to fraction form
    18,781,971.60/28,172,957.40 = 18,781,971.60/x
  3. Step 3: Cross multiply
    18,781,971.60x = 28,172,957.40 × 18,781,971.60
  4. Step 4: Simplify right side
    18,781,971.60x = 529,143,685,774,809.88
  5. Step 5: Solve for x
    x = 529,143,685,774,809.88/18,781,971.60
  6. Step 6: Final answer
    x = 28,172,957.40

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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.