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Finding the Fourth Proportional to 7,616.85, 11,405.22 and 6,128.15

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Solution

The fourth proportional to 7,616.85, 11,405.22 and 6,128.15 is: 9,176.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,616.85 : 11,405.22 = 6,128.15 : x
  2. Step 2: Convert to fraction form
    7,616.85/11,405.22 = 6,128.15/x
  3. Step 3: Cross multiply
    7,616.85x = 11,405.22 × 6,128.15
  4. Step 4: Simplify right side
    7,616.85x = 69,892,841.92
  5. Step 5: Solve for x
    x = 69,892,841.92/7,616.85
  6. Step 6: Final answer
    x = 9,176.08

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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.