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Finding the Fourth Proportional to 8,438.44, 11,640.18 and 5,078.92

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Solution

The fourth proportional to 8,438.44, 11,640.18 and 5,078.92 is: 7,005.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.44 : 11,640.18 = 5,078.92 : x
  2. Step 2: Convert to fraction form
    8,438.44/11,640.18 = 5,078.92/x
  3. Step 3: Cross multiply
    8,438.44x = 11,640.18 × 5,078.92
  4. Step 4: Simplify right side
    8,438.44x = 59,119,543.01
  5. Step 5: Solve for x
    x = 59,119,543.01/8,438.44
  6. Step 6: Final answer
    x = 7,005.98

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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.