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Finding the Fourth Proportional to 21,874,431.20, 32,811,646.80 and 21,874,431.20

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Solution

The fourth proportional to 21,874,431.20, 32,811,646.80 and 21,874,431.20 is: 32,811,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,874,431.20 : 32,811,646.80 = 21,874,431.20 : x
  2. Step 2: Convert to fraction form
    21,874,431.20/32,811,646.80 = 21,874,431.20/x
  3. Step 3: Cross multiply
    21,874,431.20x = 32,811,646.80 × 21,874,431.20
  4. Step 4: Simplify right side
    21,874,431.20x = 717,736,110,485,300.12
  5. Step 5: Solve for x
    x = 717,736,110,485,300.12/21,874,431.20
  6. Step 6: Final answer
    x = 32,811,646.80

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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.