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Finding the Fourth Proportional to 8,974.76, 12,390.03 and 6,294.21

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Solution

The fourth proportional to 8,974.76, 12,390.03 and 6,294.21 is: 8,689.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,974.76 : 12,390.03 = 6,294.21 : x
  2. Step 2: Convert to fraction form
    8,974.76/12,390.03 = 6,294.21/x
  3. Step 3: Cross multiply
    8,974.76x = 12,390.03 × 6,294.21
  4. Step 4: Simplify right side
    8,974.76x = 77,985,450.73
  5. Step 5: Solve for x
    x = 77,985,450.73/8,974.76
  6. Step 6: Final answer
    x = 8,689.42

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Double scale
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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.