Home / 4,121.40-6,171.54-3,430.20

Finding the Fourth Proportional to 4,121.40, 6,171.54 and 3,430.20

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Solution

The fourth proportional to 4,121.40, 6,171.54 and 3,430.20 is: 5,136.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,121.40 : 6,171.54 = 3,430.20 : x
  2. Step 2: Convert to fraction form
    4,121.40/6,171.54 = 3,430.20/x
  3. Step 3: Cross multiply
    4,121.40x = 6,171.54 × 3,430.20
  4. Step 4: Simplify right side
    4,121.40x = 21,169,616.51
  5. Step 5: Solve for x
    x = 21,169,616.51/4,121.40
  6. Step 6: Final answer
    x = 5,136.51

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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.