Home / 5,429.40-8,146.80-3,091.20

Finding the Fourth Proportional to 5,429.40, 8,146.80 and 3,091.20

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Solution

The fourth proportional to 5,429.40, 8,146.80 and 3,091.20 is: 4,638.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,429.40 : 8,146.80 = 3,091.20 : x
  2. Step 2: Convert to fraction form
    5,429.40/8,146.80 = 3,091.20/x
  3. Step 3: Cross multiply
    5,429.40x = 8,146.80 × 3,091.20
  4. Step 4: Simplify right side
    5,429.40x = 25,183,388.16
  5. Step 5: Solve for x
    x = 25,183,388.16/5,429.40
  6. Step 6: Final answer
    x = 4,638.34

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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.