Home / 3,430.84-5,136.18-2,128.12

Finding the Fourth Proportional to 3,430.84, 5,136.18 and 2,128.12

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Solution

The fourth proportional to 3,430.84, 5,136.18 and 2,128.12 is: 3,185.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.84 : 5,136.18 = 2,128.12 : x
  2. Step 2: Convert to fraction form
    3,430.84/5,136.18 = 2,128.12/x
  3. Step 3: Cross multiply
    3,430.84x = 5,136.18 × 2,128.12
  4. Step 4: Simplify right side
    3,430.84x = 10,930,407.38
  5. Step 5: Solve for x
    x = 10,930,407.38/3,430.84
  6. Step 6: Final answer
    x = 3,185.93

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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.