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Finding the Fourth Proportional to 9,386.73, 12,940.34 and 6,398.73

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Solution

The fourth proportional to 9,386.73, 12,940.34 and 6,398.73 is: 8,821.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,386.73 : 12,940.34 = 6,398.73 : x
  2. Step 2: Convert to fraction form
    9,386.73/12,940.34 = 6,398.73/x
  3. Step 3: Cross multiply
    9,386.73x = 12,940.34 × 6,398.73
  4. Step 4: Simplify right side
    9,386.73x = 82,801,709.77
  5. Step 5: Solve for x
    x = 82,801,709.77/9,386.73
  6. Step 6: Final answer
    x = 8,821.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.