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Finding the Fourth Proportional to 12,645.54, 18,972.06 and 5,624.58

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Solution

The fourth proportional to 12,645.54, 18,972.06 and 5,624.58 is: 8,438.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.54 : 18,972.06 = 5,624.58 : x
  2. Step 2: Convert to fraction form
    12,645.54/18,972.06 = 5,624.58/x
  3. Step 3: Cross multiply
    12,645.54x = 18,972.06 × 5,624.58
  4. Step 4: Simplify right side
    12,645.54x = 106,709,821.80
  5. Step 5: Solve for x
    x = 106,709,821.80/12,645.54
  6. Step 6: Final answer
    x = 8,438.54

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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.