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Finding the Fourth Proportional to 20,611,992.90, 28,818,998.70 and 20,611,992.90

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Solution

The fourth proportional to 20,611,992.90, 28,818,998.70 and 20,611,992.90 is: 28,818,998.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611,992.90 : 28,818,998.70 = 20,611,992.90 : x
  2. Step 2: Convert to fraction form
    20,611,992.90/28,818,998.70 = 20,611,992.90/x
  3. Step 3: Cross multiply
    20,611,992.90x = 28,818,998.70 × 20,611,992.90
  4. Step 4: Simplify right side
    20,611,992.90x = 594,016,996,589,509.12
  5. Step 5: Solve for x
    x = 594,016,996,589,509.12/20,611,992.90
  6. Step 6: Final answer
    x = 28,818,998.70

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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.