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Finding the Fourth Proportional to 13,355.92, 20,005.58 and 8,661.97

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Solution

The fourth proportional to 13,355.92, 20,005.58 and 8,661.97 is: 12,974.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.92 : 20,005.58 = 8,661.97 : x
  2. Step 2: Convert to fraction form
    13,355.92/20,005.58 = 8,661.97/x
  3. Step 3: Cross multiply
    13,355.92x = 20,005.58 × 8,661.97
  4. Step 4: Simplify right side
    13,355.92x = 173,287,780.45
  5. Step 5: Solve for x
    x = 173,287,780.45/13,355.92
  6. Step 6: Final answer
    x = 12,974.60

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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.