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Finding the Fourth Proportional to 7,758.72, 11,630.52 and 4,288.68

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Solution

The fourth proportional to 7,758.72, 11,630.52 and 4,288.68 is: 6,428.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,758.72 : 11,630.52 = 4,288.68 : x
  2. Step 2: Convert to fraction form
    7,758.72/11,630.52 = 4,288.68/x
  3. Step 3: Cross multiply
    7,758.72x = 11,630.52 × 4,288.68
  4. Step 4: Simplify right side
    7,758.72x = 49,879,578.51
  5. Step 5: Solve for x
    x = 49,879,578.51/7,758.72
  6. Step 6: Final answer
    x = 6,428.84

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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.