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Finding the Fourth Proportional to 7,211.52, 9,951.88 and 3,899.52

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Solution

The fourth proportional to 7,211.52, 9,951.88 and 3,899.52 is: 5,381.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,211.52 : 9,951.88 = 3,899.52 : x
  2. Step 2: Convert to fraction form
    7,211.52/9,951.88 = 3,899.52/x
  3. Step 3: Cross multiply
    7,211.52x = 9,951.88 × 3,899.52
  4. Step 4: Simplify right side
    7,211.52x = 38,807,555.10
  5. Step 5: Solve for x
    x = 38,807,555.10/7,211.52
  6. Step 6: Final answer
    x = 5,381.33

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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.