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Finding the Fourth Proportional to 19,809,780.30, 27,784,080.90 and 19,809,780.30

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Solution

The fourth proportional to 19,809,780.30, 27,784,080.90 and 19,809,780.30 is: 27,784,080.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,809,780.30 : 27,784,080.90 = 19,809,780.30 : x
  2. Step 2: Convert to fraction form
    19,809,780.30/27,784,080.90 = 19,809,780.30/x
  3. Step 3: Cross multiply
    19,809,780.30x = 27,784,080.90 × 19,809,780.30
  4. Step 4: Simplify right side
    19,809,780.30x = 550,396,538,466,426.25
  5. Step 5: Solve for x
    x = 550,396,538,466,426.25/19,809,780.30
  6. Step 6: Final answer
    x = 27,784,080.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.