Home / 7,639.12-11,449.10-4,128.98

Finding the Fourth Proportional to 7,639.12, 11,449.10 and 4,128.98

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Solution

The fourth proportional to 7,639.12, 11,449.10 and 4,128.98 is: 6,188.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,639.12 : 11,449.10 = 4,128.98 : x
  2. Step 2: Convert to fraction form
    7,639.12/11,449.10 = 4,128.98/x
  3. Step 3: Cross multiply
    7,639.12x = 11,449.10 × 4,128.98
  4. Step 4: Simplify right side
    7,639.12x = 47,273,104.92
  5. Step 5: Solve for x
    x = 47,273,104.92/7,639.12
  6. Step 6: Final answer
    x = 6,188.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.