Home / 4,210-6,316.68-2,128.88

Finding the Fourth Proportional to 4,210, 6,316.68 and 2,128.88

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Solution

The fourth proportional to 4,210, 6,316.68 and 2,128.88 is: 3,194.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,210 : 6,316.68 = 2,128.88 : x
  2. Step 2: Convert to fraction form
    4,210/6,316.68 = 2,128.88/x
  3. Step 3: Cross multiply
    4,210x = 6,316.68 × 2,128.88
  4. Step 4: Simplify right side
    4,210x = 13,447,453.72
  5. Step 5: Solve for x
    x = 13,447,453.72/4,210
  6. Step 6: Final answer
    x = 3,194.17

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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.