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Finding the Fourth Proportional to 8,644.70, 12,922.48 and 6,428.54

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Solution

The fourth proportional to 8,644.70, 12,922.48 and 6,428.54 is: 9,609.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,644.70 : 12,922.48 = 6,428.54 : x
  2. Step 2: Convert to fraction form
    8,644.70/12,922.48 = 6,428.54/x
  3. Step 3: Cross multiply
    8,644.70x = 12,922.48 × 6,428.54
  4. Step 4: Simplify right side
    8,644.70x = 83,072,679.58
  5. Step 5: Solve for x
    x = 83,072,679.58/8,644.70
  6. Step 6: Final answer
    x = 9,609.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.