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Finding the Fourth Proportional to 8,940.64, 12,329.44 and 5,354.96

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Solution

The fourth proportional to 8,940.64, 12,329.44 and 5,354.96 is: 7,384.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940.64 : 12,329.44 = 5,354.96 : x
  2. Step 2: Convert to fraction form
    8,940.64/12,329.44 = 5,354.96/x
  3. Step 3: Cross multiply
    8,940.64x = 12,329.44 × 5,354.96
  4. Step 4: Simplify right side
    8,940.64x = 66,023,658.02
  5. Step 5: Solve for x
    x = 66,023,658.02/8,940.64
  6. Step 6: Final answer
    x = 7,384.67

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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.