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Finding the Fourth Proportional to 12,679,898.52, 19,020,639.21 and 3,582,694.77

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Solution

The fourth proportional to 12,679,898.52, 19,020,639.21 and 3,582,694.77 is: 5,374,265.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679,898.52 : 19,020,639.21 = 3,582,694.77 : x
  2. Step 2: Convert to fraction form
    12,679,898.52/19,020,639.21 = 3,582,694.77/x
  3. Step 3: Cross multiply
    12,679,898.52x = 19,020,639.21 × 3,582,694.77
  4. Step 4: Simplify right side
    12,679,898.52x = 68,145,144,534,961.43
  5. Step 5: Solve for x
    x = 68,145,144,534,961.43/12,679,898.52
  6. Step 6: Final answer
    x = 5,374,265.76

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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.