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Finding the Fourth Proportional to 12,398.73, 18,599.27 and 4,078.77

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Solution

The fourth proportional to 12,398.73, 18,599.27 and 4,078.77 is: 6,118.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,398.73 : 18,599.27 = 4,078.77 : x
  2. Step 2: Convert to fraction form
    12,398.73/18,599.27 = 4,078.77/x
  3. Step 3: Cross multiply
    12,398.73x = 18,599.27 × 4,078.77
  4. Step 4: Simplify right side
    12,398.73x = 75,862,124.10
  5. Step 5: Solve for x
    x = 75,862,124.10/12,398.73
  6. Step 6: Final answer
    x = 6,118.54

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1.5x scale

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.