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Finding the Fourth Proportional to 19,811,221.60, 27,679,023.20 and 19,811,221.60

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Solution

The fourth proportional to 19,811,221.60, 27,679,023.20 and 19,811,221.60 is: 27,679,023.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811,221.60 : 27,679,023.20 = 19,811,221.60 : x
  2. Step 2: Convert to fraction form
    19,811,221.60/27,679,023.20 = 19,811,221.60/x
  3. Step 3: Cross multiply
    19,811,221.60x = 27,679,023.20 × 19,811,221.60
  4. Step 4: Simplify right side
    19,811,221.60x = 548,355,262,286,741.12
  5. Step 5: Solve for x
    x = 548,355,262,286,741.12/19,811,221.60
  6. Step 6: Final answer
    x = 27,679,023.20

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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.