Home / 7,678.68-11,516.86-2,131.44

Finding the Fourth Proportional to 7,678.68, 11,516.86 and 2,131.44

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Solution

The fourth proportional to 7,678.68, 11,516.86 and 2,131.44 is: 3,196.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.68 : 11,516.86 = 2,131.44 : x
  2. Step 2: Convert to fraction form
    7,678.68/11,516.86 = 2,131.44/x
  3. Step 3: Cross multiply
    7,678.68x = 11,516.86 × 2,131.44
  4. Step 4: Simplify right side
    7,678.68x = 24,547,496.08
  5. Step 5: Solve for x
    x = 24,547,496.08/7,678.68
  6. Step 6: Final answer
    x = 3,196.84

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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.