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Finding the Fourth Proportional to 8,951.85, 12,352.64 and 5,174.28

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Solution

The fourth proportional to 8,951.85, 12,352.64 and 5,174.28 is: 7,139.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,951.85 : 12,352.64 = 5,174.28 : x
  2. Step 2: Convert to fraction form
    8,951.85/12,352.64 = 5,174.28/x
  3. Step 3: Cross multiply
    8,951.85x = 12,352.64 × 5,174.28
  4. Step 4: Simplify right side
    8,951.85x = 63,915,992.23
  5. Step 5: Solve for x
    x = 63,915,992.23/8,951.85
  6. Step 6: Final answer
    x = 7,139.98

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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.